Nikolova, I. M., and V. M. Vasileva. “Effect of Alfalfa Cultivation on the Damage by Otiorhynchus Ligustici Linnaeus (Coleoptera, Curculionidae)”. Journal of BioScience and Biotechnology, vol. 10, no. 2, Dec. 2021, pp. 129-35, https://editorial.uni-plovdiv.bg/index.php/JBB/article/view/392.