1. Definitional trees;Antoy,1992
2. Compiling pattern matching;Augustsson,1985
3. Baxter, L.D., “The complexity of unification,” Ph.D. thesis, University of Waterloo (1976)
4. μCRL: A toolset for analysing algebraic specifications;Blom,2001
5. Maude: specification and programming in rewriting logic;Clavel;Theoretical Computer Science,2002