@article{JETPL.102.10, title = {}, author = {Lutostansky, Yu. S. and Tikhonov, V. N.}, journal = {JETP Lett.}, volume = {102}, issue = {1}, pages = {7}, year = {2015}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15130020}, note = {[Pisma v ZhETF 102, 10 (2015)]} }