@article{zu229887, title = {?????????? ???????????? ? ?????????? ???????? ????????? ???????? ????????}, author = {?. ?. ??????? and ?. ?. ??????}, publisher = {????? ?????????}, year = {2019}, pages = {415--417}, journal = {?????????? ??????????? - 2019}, url = {http://eprints.zu.edu.ua/29887/} }