Ojong, E.T. et al. 2020. Effects of Thymus vulgaris, Euphorbia hirta and Alium sativum as Feed Additives on the Growth Parameters and Semen Characteristics of Kabir Chicken Roosters. International Journal of Livestock Research. 10, 7 (Jul. 2020), 85–97. DOI:https://doi.org/10.5455/ijlr.20200505093405 .