@article{zu212548,
           title = {????? ??????? ???????????? ???????},
          author = {?. ?. ??????? and ?. ?. ??????},
       publisher = {??? ????? ????? ??????},
            year = {2014},
           pages = {121--123},
         journal = {?????????? ??????????? 2014},
             url = {http://eprints.zu.edu.ua/12548/}
}