M. Tsindlekht, N. Logoboy, V. Egorov, R. Kramer, A. Jansen, і W. Joss, «Giant parametric amplification of the nonlinear response in a single crystal of beryllium in a quantizing magnetic field», Fiz. Nizk. Temp., вип. 32, вип. 8-9, с. 1129–1135, Сер 2006.