Psychological characteristics of ethnic groups in the South of Russia, diagnosed using the hand testPavel Ermakov, Elena Vorobyeva, Ekaterina Kovsh, Sergey Shlyk, Fatimet Khakunova, Asya Bersirova and Magomed DalgatovE3S Web Conf., 210 (2020) 19023DOI: https://doi.org/10.1051/e3sconf/202021019023