Ewa Orlowska Anna Maria Radzikowska Relational Representability for Algebras of Substructural Logics. 212-224 2005 conf/RelMiCS/2005 RelMiCS http://dx.doi.org/10.1007/11734673_17 db/conf/RelMiCS/RelMiCS2005.html#OrlowskaR05