@article{zu225742, number = {5}, month = {????????}, author = {?. ?. ???????}, title = {???? ??? ? ??????????? ?????????-???????????? ?????????? ????????? ????????? ? ??????? ???????? ???????????? ?????????}, publisher = {???-?? ?.?.??????, ???????}, journal = {????????? ??????? ???????? ???????????}, pages = {163--165}, year = {2017}, url = {http://eprints.zu.edu.ua/25742/} }