@article{zu217730,
          volume = {17},
          number = {8},
           title = {?????? ?????????????? ? ????????????????? ?????? ?? ??????? ???????},
          author = {?. ?. ??????? and ?. ?. ?????? and ?. ?. ??????? and ?. ?. ???????? and ?. ?. ??????},
            year = {1981},
           pages = {1711--1716},
         journal = {?????? ???????????? ?????},
             url = {http://eprints.zu.edu.ua/17730/}
}