razik ridzuan mohd tajuddin, nurulkamal masseran.  (2023).  quantifying haze effect using air pollution index data.  - sains malaysiana.  -. 

nurulkamal masseran, razik ridzuan mohd tajuddin, mohd talib latif.  (2023).  classifying severity of unhealthy air pollution events in malaysia: a decision tree model.  - sains malaysiana.  2971-2983. 

razik ridzuan mohd tajuddin, noriszura ismail, kamarulzaman ibrahim.  (2022).  several two-component mixture distributions for count data.  - communications in statistics - simulation and computation.  3760-3771. 

razik ridzuan mohd tajuddin, noriszura ismail, kamarulzaman ibrahim, shaiful anuar abu bakar.  (2022).  a new zero-one-inflated poisson-lindley distribution for modeling overdispersed count data.  - bulletin of the malaysian mathematical sciences society.  21-35.