Zulkarnain, N., Mohammad, N. F. and Shogar, I. (2023) “MODIFIED SEIRD MODEL: A NOVEL SYSTEM DYNAMICS APPROACH IN MODELLING THE SPREAD OF COVID-19 IN MALAYSIA DURING THE PRE-VACCINATION PERIOD”, IIUM Engineering Journal, 24(2), pp. 159–183. doi: 10.31436/iiumej.v24i2.2550.