@article{zu217738,
          volume = {27},
          number = {11},
           title = {?????? ??????? ?????? ?????? ?? ???????????? ? ???????????? ? ?????????? ???????},
          author = {?. ?. ??????? and ?. ?. ?????? and ?. ?. ???????? and ?. ?. ???????},
            year = {1991},
           pages = {2441--2445},
         journal = {?????? ???????????? ?????},
             url = {http://eprints.zu.edu.ua/17738/}
}