@article{zu21775,
          number = {13},
           title = {????????-???????????? ?????? ???????? ??????????? ????????? ? ???????},
          author = {?. ?. ??????},
            year = {2003},
           pages = {158--161},
         journal = {?????? ????????????? ?????????? ???????????? ????? ????? ??????},
             url = {http://eprints.zu.edu.ua/1775/},
        abstract = {? ?????? ????????? ???????? ?????? ??????? ???????? ??????????? ????????? ? ??????? ????????? ? ??????????? ????? ?? 20-30??. ?? ????????.}
}