@article{zu215766,
           title = {?????????? ??????? ????? ?????????? ??????? ?? ???????????-?????? ??????? ???????????},
          author = {?. ?. ?????? and ?. ?. ?????????},
            year = {1990},
         journal = {?????????????? ????????? ? ?????????? ???????},
             url = {http://eprints.zu.edu.ua/15766/}
}