Leo Bachmair Harald Ganzinger Uwe Waldmann Superposition with Simplification as a Desision Procedure for the Monadic Class with Equality. 83-96 1993 conf/kgc/1993 Kurt Gödel Colloquium db/conf/kgc/kgc93.html#BachmairGW93 http://dx.doi.org/10.1007/BFb0022557