@article{zu21959, number = {22}, title = {????????????? ?? ???????????????? ? ??????????????}, author = {?. ?. ??????}, year = {2005}, pages = {147--149}, journal = {?????? ????????????? ?????????? ???????????? ????? ????? ??????}, url = {http://eprints.zu.edu.ua/1959/}, abstract = {????????????? ????? ????????????? ?? ??????? ?????????????? ????????? ? ???????, ?? ???????? ???????? ????????? ??? ???????? ?? ????? ?????? ????????????? ? ?????.} }