by Dinev, S G, Dreischuh, A A, Balushev, S
Published in Physica scripta (01.06.1993)

by Babin, S., Hinze, U., Balushev, S., Apolonskii, A., Tiemann, E., Wellegehausen, B.
Published in EQEC'96. 1996 European Quantum Electronic Conference (1996)