Zainal, S., Zamre, N. M. and Khan, M. F. (2021) “Emission level of air pollutants during 2019 pre-haze, haze, and post-haze episodes in Kuala Lumpur and Putrajaya”, Malaysian Journal of Chemical Engineering & Technology, 4(2), pp. 137–154. doi: 10.24191/mjcet.v4i2.14299.