Conference paper (1999) - S Winnerl (author), E Schomburg (author), NN Ledentsov (author), VM Ustinov (author), AE Zhukov (author), AR Kovsh (author), PS Kop'ev (author), S Brandl (author), F Klappenberg (author), KF Renk (author), AFG van der Meer (author), J.N. Hovenier (author), R van Es (author), TO Klaassen (author), AA Ignatov (author)