Fri, 16 May 1997 16:10:19 +0200 mueller commented out qed (in case the MC is unavailable);
Fri, 16 May 1997 16:08:38 +0200 mueller added Modelcheck example;
Fri, 16 May 1997 15:57:11 +0200 wenzelm still under construction!
Fri, 16 May 1997 15:55:02 +0200 wenzelm improved www4 ref;
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