@article{zu25291, number = {32}, title = {????? ???????????? ???????? ??????? ????????? ????? ????????????? ?????? ?? ???????????? ????????? ?????? ? ??????? ??????????}, author = {?. ?. ?????????? and ?. ?. ?????????? and ?. ?. ????}, year = {2003}, pages = {261--265}, journal = {?????? ??????????? ????????????. ????? ??????????}, url = {http://eprints.zu.edu.ua/5291/} }