Johannes Stein
DFKI, DFKI Technical Memos (TM), Vol. 91-06, 1991.
Harold Boley (Hrsg.)
Second, Revised Edition, DFKI, DFKI Technical Memos (TM), Vol. 91-04, 1991.
Otto Kühn; Marc Linster; Gabriele Schmidt
DFKI, DFKI Technical Memos (TM), Vol. 91-03, 1991.
Knut Hinkelmann
DFKI, DFKI Technical Memos (TM), Vol. 91-02, 1991.
Jana Koehler
DFKI, DFKI Technical Memos (TM), Vol. 91-01, 1991.