@article{zu233728, number = {52-53}, title = {????????? ?????? ????????? ????? ?? ???????? ????????????? ???????????? ?????? ?? ???????????? ??????????? ???????????}, author = {?. ?. ??????}, publisher = {??? ?????}, year = {2019}, pages = {60--64}, journal = {???????-?????????? ?????? ??????????? ???????}, url = {http://eprints.zu.edu.ua/33728/} }