@article{zu217732,
          volume = {21},
          number = {2},
           title = {???????? ????????? ????? ? ??????????????? ?????????? ????? ??????????? ???? ?????????????? ? 9???????????????},
          author = {?. ?. ??????? and ?. ?. ??????},
            year = {1985},
           pages = {392--398},
         journal = {?????? ???????????? ?????},
             url = {http://eprints.zu.edu.ua/17732/}
}