@book{zu231886, title = {???????? ??????? ? ?????????? ?? ??????-????????????? ?????????? ????????????? ?????????? ???????????? ????? ????? ??????: ?????????? ????????}, author = {?. ?. ????? and ?. ?. ?????? and ?. ?. ??????}, publisher = {???}, year = {2004}, url = {http://eprints.zu.edu.ua/31886/} }