@article{zu2668, number = {13}, title = {????????? ????????? ???????? ???????? ???????? ?????????}, author = {?. ?. ????????}, publisher = {???-?? ??? ??. ?.??????}, year = {2003}, pages = {109--111}, journal = {?????? ????????????? ?????????? ???????????? ????? ????? ??????}, url = {http://eprints.zu.edu.ua/668/}, abstract = {???????? ?????? ???????????? ??????? ???????? ??????????? ????????? ???????? ???????? ? ?????????? ???????? ?????? ?????????? ?????.} }