@article{JETPL.102.192, title = {}, author = {Prudnikov, V. V. and Prudnikov, P. V. and , and , }, journal = {JETP Lett.}, volume = {102}, issue = {3}, pages = {167}, year = {2015}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15150072}, note = {[Pisma v ZhETF 102, 192 (2015)]} }