@article{zu21748, title = {?????????? ? ???????????? ???????}, author = {?. ?. ??????????? and ?. ?. ????????}, year = {2007}, pages = {154--157}, journal = {?????? ????????????? ?????????? ???????????? ????? ????? ??????}, url = {http://eprints.zu.edu.ua/1748/}, abstract = {? ?????? ?????????? ??????????? ??????????? ???????????? ??????? ? ?????? ??????????? ???????????. ?????????????? ???? ??????????? ???????? ????????? ?????????????? ???????? ? ??????? ????????? ????????????? ????????.} }