@article{zu218386, number = {2(13)}, title = {????????? ? ???????? ?????????? ????????? ??????????? ? ?????????????? ????????????}, author = {?. ?. ?????????}, publisher = {????????????? ??????????????? ???????????}, year = {2013}, pages = {59--63}, journal = {?????? ????? ???}, url = {http://eprints.zu.edu.ua/18386/} }