@article{zu21255, number = {13}, title = {??? ????????? ????????????? ????????? ????? ????????????}, author = {?. ?. ????}, year = {2003}, pages = {45--47}, journal = {?????? ????????????? ?????????? ???????????? ????? ????? ??????}, url = {http://eprints.zu.edu.ua/1255/}, abstract = {????????????? ??????? ?????????? ????????????? ????????? ????? ???????????? ?? ???????????? ??????? ????? ?? ??????????.} }