@article{JETPL.106.731, title = {}, author = {, and Shabaev, V. M. and , and Tupitsyn, I. I.}, journal = {JETP Lett.}, volume = {106}, issue = {12}, pages = {765}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17240018}, note = {[Pisma v ZhETF 106, 731 (2017)]} }