K. Nigam, Prabhat, R. Chowdhury, Sunil, P. Kamboj, Ved & Chandra, Harish. (1987). Effect of centchroman on lipid metabolism in genital organs of female rhesus monkeys (macaca mulatta). Malaysian Journal of Reproductive Health, 5 (1), 37-45.

Verma G.N. & Kartar Srivastava. (1987). Effect of norgestrel and testosterone on male rats. Malaysia Journal of Reproductive Health, 5(1), 31-36.

National Family Planning Board, Malaysia. (1980). Ethnicity, attitude and fertility survey.