2001:

Applied Physics A, manuscript S.V. Grigoriev, S.V. Maleyev, V.V. Deriglazov, A.I. Okorokov, N.H. van Dijk, E. Bruck, J.C. P.Klaasse, H. Eckerlebe, G. Kozik
M.G. Shelyapina, V.S. Kasperovich, B.F. Shchegolev, E.V. Charnaya Physica status solidi (b) 225 (2001) 171-177 http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1521-3951(200105)225:1%3C171::AID-PSSB171%3E3.0.CO;2-0/abstract ...