@inproceedings{zu221641,
       booktitle = {????????????? ???????? ?????? ? ????? ????? ? ?????? ?????????? ??????},
           title = {??????????? ??????????-?????????????},
          author = {?. ?. ??????? and ?. ?. ??????????},
            year = {1998},
           pages = {171--175},
             url = {http://eprints.zu.edu.ua/21641/}
}