@article{zu227232, title = {????????? ??????????? ?????????????? ????????? ?. ?????????}, author = {?. ?. ?????????????? and ?. ?. ??????????}, publisher = {?? ??????}, year = {2018}, pages = {190--192}, journal = {?????????? ??????????? ? 2018}, url = {http://eprints.zu.edu.ua/27232/} }