@article{JETPL.99.729, title = {}, author = {Zubarev, N. M. and Kochurin, E. A.}, journal = {JETP Lett.}, volume = {99}, issue = {11}, pages = {627}, year = {2014}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X14110046}, note = {[Pisma v ZhETF 99, 729 (2014)]} }