@article{zu21387, number = {25}, title = {??????????? ???????? ? ?????????? ?????????????? ?????????????? ??????}, author = {?. ?. ????????}, year = {2005}, pages = {206--208}, journal = {?????? ????????????? ?????????? ???????????? ????? ????? ??????}, url = {http://eprints.zu.edu.ua/1387/}, abstract = {? ?????? ?????? ????????? ????????????? ???? ???????? ? ?????????? ?????????????? ?????????????? ??????.} }