@article{JETPL.99.131, title = {}, author = {Popel, S. I. and Golub?, A. P. and , and , and , and , and , and , and , }, journal = {JETP Lett.}, volume = {99}, issue = {3}, pages = {115}, year = {2014}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X14030011}, note = {[Pisma v ZhETF 99, 131 (2014)]} }