@article{JETPL.98.693, title = {}, author = {Prudnikov, P. V. and Prudnikov, V. V. and , }, journal = {JETP Lett.}, volume = {98}, issue = {10}, pages = {619}, year = {2013}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X13220086}, note = {[Pisma v ZhETF 98, 693 (2013)]} }