@article{zu221287, title = {????????? ???????????????? ?. ??????? ???????????? ??????}, author = {?. ?. ????? and ?. ?. ??????}, publisher = {?? "????"}, year = {2016}, pages = {187--188}, journal = {?????????? ??????????? - 2016}, url = {http://eprints.zu.edu.ua/21287/} }