[1] Borys Grinchenko Kyiv Metropolitan Univ, 18-2 Bulvarno Kudriavska Str, UA-04053 Kiev, Ukraine
[2] Kirovograd Reg IN Serv Training Inst, Municipal Inst, 39-63 Velyka Perspectivna Str, UA-25006 Kropyvnytskyi, Ukraine
[3] Ivan Franko Natl Univ Lviv, 1 Univ Ska St, UA-79000 Lvov, Ukraine
[4] Lesya Ukrainka Volyn Natl Univ, 13 Volya Ave, UA-43025 Lutsk, Ukraine