@inproceedings{zu221518,
       booktitle = {????????????? ???????? ?????? ? ????? ????? ? ?????? ?????????? ??????},
           title = {??????? ?????? ??? ????????? ????},
          author = {?. ?. ??????},
            year = {1998},
           pages = {180--182},
             url = {http://eprints.zu.edu.ua/21518/}
}