Zainudin Hussain, Azmi Man, and Ahmad Sofiman Othman. 2011. “Association of Commercial Rice Varieties With Weedy Rice Accessions (Oryza Sativa Complex) in Pulau Pinang’s Rice Granary Area”. Tropical Life Sciences Research 22 (2): 1–11. https://ejournal.usm.my/tlsr/article/view/tlsr_vol22-no-2-2011_1.