menghan gao, khai ern lee, aida soraya shamsuddin.  (2025).  landscape approaches and stakeholder engagement in nature-based solutions for sustainable river floodplains: a systematic review.  - ecological indicators.  1 - 22. 

noor zarina mohd nazir, khai ern lee, ainul rasyidah ab rahim, thian lai goh, mazlin mokhtar, wan abd rahim wan abdullah, huzaini husain, raja baharudin raja mamat.  (2025).  delineating the fundamental attributes and traits of nature-based solutions in wastewater management.  - journal of environmental management.  1 - 18. 

nur hairunnisa rafaai, khai ern lee, noor zarina mohd nazir, amirruddin abdul kadir, ainul rasyidah ab rahim, mazlin mokhtar, thian lai goh.  (2025).  from fragmentation to consolidation: an integrated approach for multidimensional analysis of water security in langat river basin, malaysia.  - environmental science and policy .  1 - 21. 

yee keong choy, ayumi onuma, khai ern lee .  (2025).  the nexus of industrial–urban sustainability, the circular economy, and climate–ecosystem resilience: a synthesis.  - sustainability .  1 - 47. 

nur hairunnisa rafaai, khai ern lee, noor zarina mohd nazir, ainul rasyidah ab rahim, thian lai goh, mazlin mokhtar, wan abd rahim wan abdullah, huzaini husain, raja baharudin raja mamat.  (2025).  mapping sewage treatment plants for wastewater reclamation and reuse in industrial parks of peninsular malaysia: a path towards water security.  - water resources and industry .  1 - 16. 

tan jia qi, norasiah sulaiman, nor shahidah mohd nazer, muhammad taqiuddin zakaria, nurul ‘amalina md nor, askury abd kadir, abdul ghani rafek, ailie sofyiana serasa, lee khai ern, goh thian lai.  (2025).  systematic approach to boulder stability assessment at a boulder covered area: case study at gunung bujang melaka, kampar, perak.  - sains malaysiana.  1657 - 1666. 

zhenghua liu, goh thian lai, abdul g.m. rafek, ailie s. serasa, lee khai ern.  (2025).  ages of detrital zircons from deep-water gas field l3 in the northern south china sea and their significance for provenance evolution.  - sains malaysiana.  663 - 675. 

zhimin chen, muhammad rizal razman, sharifah zarina syed zakaria, khai ern lee, jue wang.  (2025).  understanding fluoride's influence on mental health: aigc educational methods for undergraduate students.  - fluoride.  1 - 14. 

liao kaifei, zhong kai, lu yi, goh thian lai, lee khai ern.  (2024).  characteristics of oil and gas distribution and controlling factors of hydrocarbon accumulations in the eocene pinghu formation of the xihu depression, east china sea.  - sains malaysiana.  1545 - 1558. 

afiq f.a. rahim, abdul g.m. rafek, ailie s. serasa , abd rasid jaapar, goh thian lai, rodeano roslee, lee khai ern , nguyen xuan huy, tran van xuan.  (2023).  a review of rock slope stability assessment practice in malaysia.  - sains malaysiana.  399-416. 

asvinidevi arumugam, khai ern lee, pei yuen ng, aida soraya shamsuddin, aziemah zulkifli, thian lai goh.  (2025).  pharmaceuticals as emerging pollutants: implications for water resource management in malaysia.  - emerging contaminants.  1 - 26. 

zhenghua liu, goh thian lai, abdul g.m. rafek, ailie s. serasa, lee khai ern.  (2025).  ages of detrital zircons from deep-water gas field l3 in the northern south china sea and their significance for provenance evolution.  - sains malaysiana.  663 - 675. 

noor zarina mohd nazir, khai ern lee, ainul rasyidah ab rahim, thian lai goh, mazlin mokhtar, wan abd rahim wan abdullah, huzaini husain, raja baharudin raja mamat.  (2025).  delineating the fundamental attributes and traits of nature-based solutions in wastewater management.  - journal of environmental management.  1 - 18. 

nurul' ain jamion, khai ern lee, mazlin mokhtar, thian lai goh.  (2025).  water quality assessment of ex-mining lakes converted man-made wetlands in paya indah wetlands, selangor, malaysia.  - water, air & soil pollution.  1 - 23. 

yee keong choy, ayumi onuma, khai ern lee .  (2025).  the nexus of industrial–urban sustainability, the circular economy, and climate–ecosystem resilience: a synthesis.  - sustainability .  1 - 47. 

nurilla elysa putri, nor diana mohd idris, lee khai ern.  (2025).  the flooding issues are facing by small-scale rice farmers in south sumatra, indonesia .  - iop conf. series: earth and environmental sciences.  1 - 8. 

m r zainudin, h w you, k e lee, a m zahidi.  (2023).  quality control assessment in the river of kajang, selangor, malaysia.  - international conference on civil and environmental engineering 2022 (cenviron2022).  1-8. 

haris hafizal abd hamid, mohd shahrul mohd nadzir, khai ern lee, alefee ayatillah, mohd talib latif, murnira othman.  (2023).  indoor level of btex and health risk assessment at science laboratories in a university.  - 4th international symposium on civil and environmental engineering (iscee 2022) iop conf. series: earth and environmental science.  1-8. 

kamilia sharir, goh thian lai, norbert simon, lee khai ern, eldawaty madran, rodeano roslee.  (2022).  debris flow susceptibility analysis using a bivariate statistical analysis in the panataran river, kg melangkap, sabah, malaysia.  - natural disaster seminar 2019 iop conf. series: earth and environmental science.  1-11. 

kamilia sharir, goh thian lai, norbert simon, lee khai ern, mustapha abd talip, rodeano roslee.  (2022).  assessment of flood susceptibility analysis using analytical hierarchy process (ahp) in kota belud area, sabah, malaysia.  - natural disaster seminar 2019 iop conf. series: earth and environmental science.  1-11. 

naziatul aziah mohd radzi, normaizatul akma saidi, lee khai ern.  (2024).  pembangunan dan penghidupan lestari ke arah wawasan kemakmuran bersama.  - .  406 - 428. 

rasyikah md khalid, lee khai ern, nurlina mohamad ramzan, nik mohd noor faizul md. saad, wan nur`ashiqin wan mohamad, nur farhana abd razak, nur fadzlun johan.  (2024).  isu sepunya peringkat jajahan di lembangan sungai kedah.  - .  80 - 93. 

lee khai ern, mazlin mokhtar.  (2024).  isu dan cabaran perubahan iklim di kedah darul aman.  - .  23 - 32. 

rasyikah md khalid, lee khai ern, nurlina mohamad ramzan.  (2024).  lembangan sungai di negeri kedah darul aman.  - .  13 - 22. 

khai ern lee, mazlin mokhtar, rasyikah md khalid, thian lai goh, norbert simon, kylie ching mun wang.  (2022).  strategies for a low carbon island towards climate change adaptation and mitigation (goal 13).  - .  155-165. 

muhammad aidil hakimi mohd noor, nurul jannah adnan, nur al maidah che mod, ahmad shamil sabudin, tan jia qi, norasiah sulaiman, muhammad taqiuddin zakaria, nurul ‘amalina md nor, askury abd kadir, abdul ghani rafek, ailie sofyiana serasa, lee khai ern, goh thian lai.  (2024).  geomechanicw characterisation and influence of surface roughness on stability of granitic boulders in kampar perak.  - 37th national geoscience conference 2024.  . 

naziatul aziah mohd radzi, normaizatul akma saidi, lee khai ern.  (2024).  pembangunan dan penghidupan lestari ke arah wawasan kemakmuran bersama.  - .  406 - 428. 

rasyikah md khalid, lee khai ern, nurlina mohamad ramzan, nik mohd noor faizul md. saad, wan nur`ashiqin wan mohamad, nur farhana abd razak, nur fadzlun johan.  (2024).  isu sepunya peringkat jajahan di lembangan sungai kedah.  - .  80 - 93. 

lee khai ern, mazlin mokhtar.  (2024).  isu dan cabaran perubahan iklim di kedah darul aman.  - .  23 - 32. 

rasyikah md khalid, lee khai ern, nurlina mohamad ramzan.  (2024).  lembangan sungai di negeri kedah darul aman.  - .  13 - 22. 

e. bahatiar, a. zulkifli*, a.s. shamsuddin, k.e. lee1 n. zainal abidin, e. zainal abidin.  (2025).  knowledge, attitude, and perceptions on tobacco product waste and the environmental consequences: a review.  - -.  28 - 28. 

lee khai ern, nurul' ain jamion.  (2025).  integrating nature values into carbon-water nexus of constructed wetland: the case of the paya indah wetlands, malaysia.  - webinar: “developments in environmental chemistry and future prospects”.  . 

lee khai ern.  (2025).  unipeq sdn bhd sustainability report 2024.  - .  . 

aziemah zulkifli, aida soraya shamsuddin, emilia zainal abidin, najihah zainol abidin, muhammad amirulamri mohd akhairi, lee khai ern & goh choo ta.  (2024).  global impacts of cigarette butt waste: a review on environmental contamination and ecological risks.  - the 4th international conference on research and development (icorad 2024).  . 

ainul rasyidah ab rahim, khai ern lee, noor zarina mohd nazir, wan abd rahim wan abdullah, raja baharudin raja mamat, thian lai goh, mazlin mokhtar .  (2024).  unlocking the potential of wastewater reclamation and reuse for sustainable water management in malaysia.  - national water innovation conference and exhibition 2024.  .