@article{zu221216,
          number = {20},
           title = {???????? ????????? ??????????? ??????????? ?????? ???????????, ??? ????????????? ??? ?????????? ???????????? ? ???????? ??? ???????????},
          author = {?. ?. ?????????},
       publisher = {?.: ??-? ??????? ? ????? ??. ?.?. ?????????? ??? ???????},
            year = {2009},
           pages = {539--546},
         journal = {??????? ???????: ???????? ???????? ?????},
             url = {http://eprints.zu.edu.ua/21216/}
}