@article{zu218388, number = {2(13)}, title = {????? ???????? ?????????????? ? ?????????-?????????????? ?????????}, author = {?. ?. ??????}, publisher = {????????????? ??????????????? ???????????}, year = {2013}, pages = {63--66}, journal = {?????? ????? ???}, url = {http://eprints.zu.edu.ua/18388/} }