@article{zu224270, volume = {2}, month = {????????}, author = {?. ?. ?????????}, title = {???????????? ??????????? ?????????? ??????? ? ?????? ?????????? ???????????????? ?????????? ????????}, publisher = {??-? ?????????}, journal = {??????? ?????????? ?????????????? ???????-?????????? ??????????? ????????????? ?????????? ? ???????? ???????}, pages = {257--262}, year = {2017}, url = {http://eprints.zu.edu.ua/24270/} }