M.A. Mastro, S. Maximenko, M. Gowda, B.S. Simpkins, P.E. Pehrsson, J.P. Long, A.J. Makinen, J.A. Freitas Jr., J.K. Hite, C.R. Eddy Jr. and J. Kim
Journal of Crystal Growth 311 ( 10 ): 2982 - 2986 , 2009