@article{zu230872, title = {????? ????????? ?? ????? ?????????? ?????????? ?????????????? ????? ??????? ????????? ?????}, author = {?. ?. ??????????? and ?. ?. ???????}, year = {2020}, journal = {?????? ? ???????? ???????? ????????? ???}, url = {http://eprints.zu.edu.ua/30872/} }