1. 1) Thang, T. D.; Dai, D. N.; Hoi, T. M.; Ogunwande, I. A. Essential oils from five species of Annonaceae from Vietnam. Nat. Prodt. Commun. 8, 239-242 (2013).
2. 2) Chansang, U.; Zahiri, N. S.; Bansiddhi, J.; Boonruad, T.; Thongsrirak, P.; Mingmuang, J.; Benjapong, N.; Mulla, M.S. Mosquito larvicidal activity of aqueous extracts of long pepper (Piper retrofractum vahl) from Thailand. J. Vector Ecol. 30, 195-200 (2005).
3. 3) Rahmawati, N.; Bachri, M. S. The aphrodisiac effect and toxicity of combination Piper retrofractum L., Centella asiatica and Curcuma domestica infusion. Health Sci. J. (Indonesia) 3, 19-22 (2012).
4. 4) Tripathi, A. K.; Sharma, S.; Kumar, S.; Edison, S.; Ramana, K. V.; Sasikumar, B.; Babu, K. N.; Eapen, S. J. Repellent and insecticidal properties of Piper retrofractum against insect pests of crops and stored grain. Biotechnology of spices, medicinal & aromatic plants. Proceedings of the national seminar on biotechnology of spices and aromatic plants, Calicut, India, pp. 134-138 (1997).
5. 5) Nidhi, R. S.; Mittal, S. V.; Menghani, E. Antioxidant agents alternative source for malaria disease. Int. J. Appl. Phar. 4, 14-16 (2012).