@article{zu217837,
          volume = {20},
          number = {2},
          author = {?. ?. ????? and ?. ?. ??????},
           title = {???????? ???????? ???????????? ????????? ??? ????????????? ?????????????},
       publisher = {??????? ???},
         journal = {??????? ???},
           pages = {430--434},
            year = {2015},
             url = {http://eprints.zu.edu.ua/17837/}
}