@article{JETPL.102.344, title = {}, author = {Stepina, N. P. and , and Nenashev, A. V. and Dvurechenskii, A. V.}, journal = {JETP Lett.}, volume = {102}, issue = {5}, pages = {312}, year = {2015}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15170117}, note = {[Pisma v ZhETF 102, 344 (2015)]} }