On the Closure Properties of the Class of Full G-models of a Deductive System.

Josep Maria Font Ramon Jansana Don Pigozzi On the Closure Properties of the Class of Full G-models of a Deductive System. 215-278 2006 83 Studia Logica 1-3 http://dx.doi.org/10.1007/s11225-006-8304-6 db/journals/sLogica/sLogica83.html#FontJP06