@article{zu23508, number = {11}, title = {????????? ????? ????????? ?????-?????????????? ????????? ????????}, author = {?. ?. ????????}, year = {2003}, pages = {171--174}, journal = {?????? ????????????? ?????????? ???????????? ????? ????? ??????}, url = {http://eprints.zu.edu.ua/3508/}, abstract = {? ?????? ????????????? ????????? ??????? ??????????? ????? ?????? ? ???????????? ????????? ????????. ???????? ????? ????????? ?????????? ?????????? ???????? ???????.} }