The effectiveness of the use of a biologically active additive ekobentokorm in the diets of cattleGalina Zelenkova, Sergei Tresnitskii, Pavel Bykadorov, Anna Pecinovsky, Aleksandr Yenin and Alexey ZelenkovE3S Web Conf., 273 (2021) 02007DOI: https://doi.org/10.1051/e3sconf/202127302007