@article{JETPL.101.403, title = {}, author = {Popov, Z. I. and Litasov, K. D. and Gavryushkin, P. N. and Ovchinnikov, S. G. and Fedorov, A. S.}, journal = {JETP Lett.}, volume = {101}, issue = {6}, pages = {371}, year = {2015}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15060028}, note = {[Pisma v ZhETF 101, 403 (2015)]} }