@article{zu21800, number = {17}, title = {??????????? ??????????? ??????? ?? ???????????? ???????}, author = {?. ?. ?????????}, year = {2004}, pages = {166--168}, journal = {?????? ????????????? ?????????? ???????????? ????? ????? ??????}, url = {http://eprints.zu.edu.ua/1800/}, abstract = {? ?????? ?????????????? ???????????? ?????? ???????????? ???????????? ????????, ???? ???????????? ?? ?????????????????? ???????????.} }