Wanna, R. “Potential of essential oils from Piper nigrum against cowpea weevil, Callosobruchus maculatus (Fabricius)”. International Journal of Agricultural Technology, vol. 17, no. 1, Jan. 2021, pp. 375-84, https://li04.tci-thaijo.org/index.php/IJAT/article/view/5943.