@article{zu217723, volume = {37}, number = {10}, title = {??????????? ????????? ???????? ? ??????????? ????? ? ????????? ?????????? ?? ?????????? (????????? ???????)}, author = {?. ?. ??????????? and ?. ?. ???????}, year = {1967}, pages = {2273--2276}, journal = {?????? ????? ?????}, url = {http://eprints.zu.edu.ua/17723/} }