@article{zu225826, number = {5}, month = {????????}, author = {?. ?. ????????}, title = {?????? ?? ??????? ??????????: ???????????? ??????}, publisher = {???-?? ?.?.??????, ???????}, journal = {????????? ??????? ???????? ???????????}, pages = {375--378}, year = {2017}, url = {http://eprints.zu.edu.ua/25826/} }