Mbouangouere, R. N., P. Tane, D. Ngamga, P. Djemgou, M. I. Choudhary, and B. T. Ngadjui. 2007. “PIPTADEROL FROM PIPTADENIA AFRICANA”. African Journal of Traditional, Complementary and Alternative Medicines 4 (3):294-98. https://journals.athmsi.org/index.php/ajtcam/article/view/223.