Stepanenko , Valentyna, Oksana Lavryniuk, Valerii Borshchenko, Mykhailo Kryvyi, Vitalii Mamchenko, and Khmelnychyi Leontiі. 2021. “Evaluation of Efficiency of Training Methods for Training Service Dogs”. Bulletin of Sumy National Agrarian University. The Series: Livestock, no. 1(44) (March), 63-68. https://doi.org/10.32845/bsnau.lvst.2021.1.9.