@article{zu213711, title = {????????? ??????? ?? ????? ? ?????????? ????????????????? ??????? ???????? ??????????? ????????}, author = {?. ?. ??????}, publisher = {???-?? ??? ????? ????? ??????}, year = {2011}, pages = {117--119}, journal = {?????? ? ???????? ?????????? ????????? ???????? ?? ???????????? ??? : ??. ?????????? ???????????}, url = {http://eprints.zu.edu.ua/13711/} }