@article{zu25528, volume = {13}, number = {2}, author = {?. ?. ???? and ?. ?. ??????}, title = {??????????? ????????????? ?? ??????????? ???????? ????????? ???????? ???? ? ????????? ???????? ??????? ?????? ?? ?????? ???????????? ??????? ?? ?????? ????'??????? ??????????}, publisher = {?????????? ???????????? ???????? ???????????}, journal = {?????? ??????????? ????????????? ????????? ????????????}, pages = {476--479}, year = {2009}, url = {http://eprints.zu.edu.ua/5528/} }