1. Abirami, K., V. Baskaran, and P. Simhachalam. 2018. ISSR marker -based diversity assessment of Piper spp. in Bay Islands, India. Indian Journal of Agricultural Research 52 (4): 434–438.
2. Adzemi, M.A., J. Hamdan, and J.S. Sjahril. 1993. Macro-nutrient removal studies on black pepper (Piper nigrum L.) in Sarawak. In The pepper industry: Problems and prospects, ed. M.Y. Ibrahim, C.F.J. Bong, and B. Ipor, 104–109. Bintulu: Universiti Pertanian Malaysia.
3. Agarwal, S. 1988. Shoot tip culture of pepper and its micropropagation. Current Science 57: 1347–1348.
4. Agrawal, R., and M. Patwardhan. 1994. Formation of piperine from in vitro culture of Piper nigrum L. Indian Journal of Plant Physiology 37: 171–173.
5. AICRPS. 2005. Annual report, all India coordinated research project on spices, 6–8. Calicut: IISR.