The Effect of the Drug Estrofan on the Content of Nitric Oxide (II), Sex Hormones, Biochemical Parameters and Their Relationship in CowsI.T. Sibgatullin, R.Ya. Gilmutdinov and T.M. ZakirovBIO Web Conf., 37 (2021) 00170DOI: https://doi.org/10.1051/bioconf/20213700170