@article{JETPL.108.516, title = {}, author = {Shchepetilnikov, A. V. and , and Nefyodov, Yu. A. and Kukushkin, I. V. and , and , and , }, journal = {JETP Lett.}, volume = {108}, issue = {7}, pages = {481}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18190116}, note = {[Pisma v ZhETF 108, 516 (2018)]} }