@article{zu23069, number = {3-4}, title = {?????????? ????????? ????? ???????????? }, author = {?. ?. ???????}, year = {2007}, pages = {96--103}, journal = {?????????? ???????????}, url = {http://eprints.zu.edu.ua/3069/}, abstract = {?????? ?????????? ?????? ?.????????????, ??? ????????????? ???????? ? ??????? ?????? ????} }