@article{zu229639, month = {????????}, title = {????? ????????????? ????????? ??????????? ??????????? ???????????}, author = {?. ?. ???????}, year = {2019}, pages = {150--152}, journal = {????????? ???????? ????????????? ????????? (??????? ???????? ?????)}, url = {http://eprints.zu.edu.ua/29639/} }