@article{zu217736,
          volume = {25},
          number = {2},
           title = {???????????? ????????????????????? ? ?????????? ???????. ?????	?????? ??????? ?????? ??????},
          author = {?. ?. ??????? and ?. ?. ?????? and ?. ?. ?????},
            year = {1989},
           pages = {435--436},
         journal = {?????? ???????????? ?????},
             url = {http://eprints.zu.edu.ua/17736/}
}