English 
Русский Phys.Rev. B, v. 81, (2010) 012408
S. V. Grigoriev, D. Chernyshov, V. A. Dyadkin, V. Dmitriev, E. V. Moskvin, D. Lamago, Th. Wolf, D. Menzel, J. Schoenes, S. V. Maleyev, H. Eckerlebe
Phys.Rev. B, v. 81, (2010) 012408
S. V. Grigoriev, D. Chernyshov, V. A. Dyadkin, V. Dmitriev, E. V. Moskvin, D. Lamago, Th. Wolf, D. Menzel, J. Schoenes, S. V. Maleyev, H. Eckerlebe