1. Agarwal, T., Singh, R., Shukla, A. D., Waris, I. & Gujrati, A. (2012). Comparative analysis of antibacterial activity of four Piper betel varieties, Advances in Applied Science Research, 3(2), 698-705.
2. Ahmad, A., Husain, A., Mujeeb, M., Khan, S. A., Abdullah, H., Alhadrami, A. & Bhandari, A. (2015). Quantification of total phenol, flavonoid content and pharmacognostical evaluation including HPTLC fingerprinting for the standardization of Piper nigrum Linn fruits. Asian Pacific Journal of Tropical Biomedicine, 5(2), 101-107.
3. Alfallous, K. A., Alnade, H. S., Kollab, W. A., Alafid, F. & Edrah, S. M. (2017). Qualitative and quantitative phytochemical analysis and antimicrobial activity of Retama extract grown in Zliten Libya. International Journal of Medical Science and Clinical Invention, (April). https://doi.org/10.18535/ijmsci/v4i4.11.
4. Annegowda, H.V., P.Y. Tan, M.N. Mordi, S. Ramanathan, M.R. Hamdan, M.H. Sulaiman & Mansor, S. M. (2013). TLC-bioautography-guided isolation, HPTLC and GC-MS-assisted analysis of bioactives of Piper betle leaf extract obtained from various extraction techniques: In vitro evaluation of phenolic content, antioxidant and antimicrobial activities. Food Analytical Methods, 6, 715-726.
5. Arambewela, L., Arawwawala, M. & Rajapaksa, D. (2006). Piper betle: A potential natural antioxidant. International Journal of Food Science and Technology, 41 (Suppl.1), 10-14.
6. Banerjee, D. & Shah, B. (2014). Anti-proliferative activity of Piper betel leaf extracts on human lung cancer cell line (A549). International Journal of Pharmacy and Pharmaceutical Sciences, 6(1), 432-435.
7. Bezerra, D. P., Ferreira, P. M. P., Machado, C. M. L., de Aquino, N. C., Silveira, E. R., Chammas, R. & Pessoa, C. (2015). Antitumour efficacy of Piper tuberculatum and piplartine based on the hollow fiber assay. Planta Medic, 81, 15-19.
8. Campelo, Y., Ombredane, A., Vasconcelos, A. G., Albuquerque, L., Moreira, D. C., Plácido, A., Rocha, J., Fokoue, H. H., Yamaguchi, L. & Mafud, A. (2018). Structure–Activity relationship of piplartine and synthetic analogues against Schistosoma mansoni and cytotoxicity to mammalian cells. International Journal of Molecular Sciences, 19, 1802.
9. Camposano, J. E, Torre, D. G. L. T., Laxamana, J. G. & Larcia, L. L. H. (2016). Screening for the anti-angiogenic activity of selected Philippine medicinal plants using chorioallantoic membrane assay. Mahidol University Journal Pharmaceutical Science, 43, 173-82.
10. Chakraborty, D. & Shah, B. (2011). Antimicrobial, anti-oxidative and anti-hemolytic activity of Piper betel leaf extracts. International Journal of Pharmacy and Pharmaceutical Sciences, 3, 192-199.
11. Chan, E. W. C. & Wong, S. K. (2014). Phytochemistry and pharmacology of three Piper species: An update. International Journal of Pharmacognosy, 1(9), 534-544.
12. Cowan, M. M. (1999). Plant products as antimicrobial agents. Clinical Microbiology Review, 12, 564-582.
13. De Souza Oliveira, F. A., Passarini, G. M., de Medeiros, D. S. S., de Azevedo Santos, A. P., Fialho, S. N., de Jesus Gouveia, A., Latorre, M., Freitag, E. M., de Maria de Medeiros, P. S., & Teles, C. B. G. (2018). Antiplasmodial and antileishmanial activities of compounds from Piper tuberculatum Jacq fruits. Revista da Sociedade Brasileira de Medicina Tropical, 51, 382-386.
14. Deshpande, S. N. & Kadam, D. G. (2013). GCMS analysis and antibacterial activity of Piper betle (Linn) leaves against Streptococcus mutans, Asian Journal of Pharmaceutical and Clinical Research, 6, 5-7.
15. Durant-Archibold, A. A., Santana, A. I. & Gupta, M. P. (2018). Ethnomedical uses and pharmacological activities of most prevalent species of genus Piper in Panama: A review. Journal of Ethnopharmacology, 217, 63–82.
16. Fasola, T.R. & Adeboye, J.O. (2015). Anti-hypertensive potentials of Peperomia pellucida (L.) HBK in anaesthetized normotensive rats. Advanced Life Science Technology, 29, 1-4.
17. Fazal, F., Mane, P.P., Rai, M.P. Thilakchand, K.R., Bhat, H.P., Kamble, P.S., Palatty, P.L. & Baliga, M.S. (2014). The phytochemistry, traditional uses and pharmacology of Piper betle Linn (Betel leaf): A pan-asiatic medicinal plant. Chinese Journal of Integrative Medicine. 1-11.
18. Ganguly, S., Mula, S., Chattopadhyay, S. & Chatterjee, M. (2007). An ethanol extract of Piper betle Linn. Mediates its anti-imflammatory activity via down-regulation of nitric oxide. The Journal of Pharmacy and Pharmacology, 59(5), 711-718.
19. Gul, R., Jan, S. U., Faridullah, S., Sherani, S. & Jahan, N. (2017). Preliminary phytochemical screening, quantitative analysis of alkaloids and antioxidant activity of crude plant extract from Ephedra intermedia indigenous to Balochistan. Scientific World Journal. https://doi.org/10.1155/2017/5873648.
20. Gundala, S. R. & Aneja, R. (2014). Piper betel leaf: a reservoir of potential xenohormetic nutraceuticals with cancer-fighting properties. Cancer Preview Resolution, 7(5), 477-486.
21. Kanjwani, D.G., T. P. Marathe, S. V. Chiplunkar & S. S. Sathaye. (2008). Evaluation of immunomodulatory activity of methanolic extract of Piper betle. Scandinavian Journal of Immunology, 67, 589-593.
22. Laksmitawati, D. R., Widyastuti, A., Karami, N., Afifah, E., Rihibiha, D. D., Nufus, H. & Widowati, W. (2017). Anti-inflammatory effects of Anredera cordifolia and Piper crocatum extracts on lipopolysaccharide-stimulated macrophage cell line. Bangladesh Journal of Pharmacology, 12, 35-40.
23. Nalina, T. & Rahim, Z. H. A. (2007). The crude aqueous extract of Piper betle L. and its antibacterial effect towards Streptococcus mutans. American Journal of Biochemistry and Biotechnology, 3(1), 10-15.
24. Nouri, L. & Nafchi, A. M. (2014). Antibacterial, mechanical, and barrier properties of sago starch film incorporated with betel leaves extract. International Journal of Biological Macromolecules, 66, 254-259.
25. Padmapriya, N. & Poonguzhali, T.V. (2015). Phytochemical screening and antibacterial property against human pathogenic bacteria from the leaves acetone extract of Piper betle, L. Asian Journal of Biochemical and Pharmaceutical Research, 5(1), 251-259.
26. Raja Mazlan, R. N. A., Rukayadi, Y., Maulidiani, M. & Ismail, I.S. (2018). Solvent extraction and identification of active anticariogenic metabolites in Piper cubeba L. through 1H-NMR-based metabolomics approach. Molecules, 23, 1730.
27. Rekha, V.P.B., Kollipara, M., Gupta, B.R.S.S.S.S., Bharath, Y. & Pulicherla, K.K (2014). A review on Piper betle L: Nature’s Promising Medicinal Reservoir. American Journal of Ethnomedicine, 1(5), 276-289.
28. Saini, S., Dhiman, A. & Nanda, S. (2016). Pharmacognostical and phytochemical studies of Piper betle Linn. leaf. International Journal of Pharmacy and Pharmaceutical Sciences, 8, 222-226.
29. Shah, S. K., Garg, G., Jhade, D. & Patel, N. (2016). Piper betle: phytochemical, pharmacological and nutritional value in health management. International Journal of Pharmaceutical Sciences Review and Research, 38, 181-189.
30. Syahidah, A., Saad, C. R., Hassan, M.D., Yaya R., Norazian, M. H. & Kamarudin, M.S. (2017). Phytochemical analysis, identification and quantification of antibacterial active compounds in Betel leaves, Piper betle Methanolic Extract. Pakistan Journal of Biological Sciences, 20(2), 70-81.DOI: 10.3923/pjbs.2017.70.81
31. Tan, Y. P & Chan, E. W. C. (2014). Antioxidant, antityrosinase and antibacterial properties of fresh and processed leaves of Anacardium occidentale and Piper betle. Food Bioscience, 6, 17-23.