azlizan mat enh, hasrina mustafa, fahri ahmed, andika wahab .  (2024).  impact of the russia-ukraine conflict on the quality and quantity of malaysia's palm oil production: a time series analysis.  - plos one.  1 - 14. 

hasrina mustafa, fahri ahmed, waffa wahida zainol, azlizan mat enh.  (2021).  forecasting the impact of gross domestic product (gdp) on international tourist arrivals to langkawi, malaysia: a postcovid-19 future.  - sustainability.  1-17.