Bujňák, L.; Marcin, A.; Naď, P.; Mihok, T. Effect of Supplemental Humic Acid With Urea As a Non Protein Dietary Nitrogen Source on Rumen Variables in Sheep. ANIM WELFARE ETOL TARTÁSTECHN 2020, 16 (1), 1-7. https://doi.org/10.17205/SZIE.AWETH.2020.1.001.