@article{zu22213, number = {21}, title = {????? ???????? ??????? ?? ???????? ?? ??????????? ???? ? ???}, author = {?. ?. ??????}, publisher = {???-?? ??? ??. ?.??????}, year = {2005}, pages = {149--151}, journal = {?????? ????????????? ?????????? ???????????? ????? ????? ??????}, url = {http://eprints.zu.edu.ua/2213/}, abstract = {? ?????? ???????? ??????? ???????????? ?????????????? ????????? ?? ???????? ? ??????????? ???? ?? ????????????? ??????????.} }