1. Arrows, Structures and Functors;Arbib,1975
2. Extensions of concept languages for a mechanical engineering application;Baader,1992
3. Term Rewriting and All That;Baader,1998
4. Unification theory;Baader,2001
5. A new approach for combining decision procedures for the word problem, and its connection to the Nelson-Oppen combination method;Baader,1997