@article{zu227072, title = {????????? ??????? ?? ????? ??????????? ?????????-???????? ??????????}, author = {?. ?. ????? and ?. ?. ??????????????}, publisher = {???????: ?? "????"}, year = {2018}, pages = {421--422}, journal = {?????????? ??????????? - 2018}, url = {http://eprints.zu.edu.ua/27072/} }