%0 Journal Article %T Investigation of the efficacy and safety of a bi-hormonal contraceptive drug in a long-term experiment %A Zeynalov, O.A. %A Belova, E.E. %A Mukaseev, S.V. %A Beloglazov, D.V. %K efficacy, safety, SEX BARRIER, cats, bi-hormonal contraceptive drug, long-term use %J Russian veterinary journal %D 2019 %N 2019 %P 7 %I Publishing house "Logos Press"