1. Abdullahi, M. Y., Musa, D. D., and Oti, E. C.: Allelopathic activity of aqueous leaf extract of Eucalyptus camaldulensis on the germintaion and growth of cowpea and Senna obtusifolia, IJCSS, 1, 41–46, 2017.
2. Altmann, J.: Observational study of behavior: sampling methods, Behaviour, 49, 227–267, https://doi.org/10.1163/156853974x00534, 1974.
3. Baker, M.: Fur rubbing: use of medicinal plants by capuchin monkeys (Cebus capucinus), Am. J. Primatol., 38, 263–270, https://doi.org/10.1002/(SICI)1098-2345(1996)38:3<263::AID-AJP5>3.0.CO;2-X, 1996.
4. Bazán-Calderón, J., Ventura-Flores, R., Kato, M. J., Rojas-Idrogo, C., and Delgado-Paredes, G. E.: Actividad insecticida de Piper tuberculatum Jacq. sobre Aedes aegypti L. (Diptera: Culicidae) y Anopheles pseudopunctipennis Tehobal (Diptera: Culicidae), Anales de Biología, 33, 135–147, 2011.
5. Bezerra, D. P., Ferreira, P. M. P., Machado, C. M. L., de Aquino, N. C., Silveira, E. R., Chammas, R., and Pessoa, C.: Antitumour efficacy of Piper tuberculatum and piplartine based on the hollow fiber assay, Planta Med., 81, 15–19, https://doi.org/10.1055/s-0034-1383363, 2015.