@article{zu213490, title = {???????????? ??'???? ?? ?????? ???????}, author = {?. ?. ??????? and ?. ?. ?????????}, publisher = {??? ?????????}, year = {2012}, pages = {337--341}, journal = {???????????? ?????? ????????? ?????????? ?? ?????????? ?????? ???????????: ??????? ???????-?????????? ????? / ?? ???. ???. ?.?. ????????, ?.?. ????????}, url = {http://eprints.zu.edu.ua/13490/} }