@article{zu25662,
           title = {????????? ????????? ? ?????? ??????????? ? ?????????
????????????},
          author = {?. ?. ???????},
            year = {2011},
           pages = {424--426},
         journal = {C?????? ???????? ?????????? ????????????? ???????????},
             url = {http://eprints.zu.edu.ua/5662/}
}