Robert Glück Masahiko Kawabe A Program Inverter for a Functional Language with Equality and Constructors. 246-264 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2895&spage=246 2003 conf/aplas/2003 APLAS db/conf/aplas/aplas2003.html#GluckK03