Stefan Berghofer Lukas Bulwahn Florian Haftmann Turning Inductive into Equational Specifications. 131-146 2009 TPHOLs http://dx.doi.org/10.1007/978-3-642-03359-9_11 conf/tphol/2009 db/conf/tphol/tphol2009.html#BerghoferBH09