@article{JETPL.100.34, title = {}, author = {, and , and , and , and , }, journal = {JETP Lett.}, volume = {100}, issue = {1}, pages = {32}, year = {2014}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X14130074}, note = {[Pisma v ZhETF 100, 34 (2014)]} }