1. P. RAU, M. SCHATZ, G. ULRYCH, W. OLDEKOP, W. ZEGGEL, M. DALLE DONNE, and F. J. ERBACHER, “Results of the Preliminary Study of a LWR with Improved Uranium Utilization,” Berlin, 1980
2. Jahrestagung Kerntechnik, p. 957, Deutsches Atomforum (in German).