Heterogeneous Reasoning with Euler/Venn Diagrams Containing Named Constants and FOL.

Nik Swoboda Gerard Allwein Heterogeneous Reasoning with Euler/Venn Diagrams Containing Named Constants and FOL. 153-187 2005 134 Electr. Notes Theor. Comput. Sci. http://dx.doi.org/10.1016/j.entcs.2005.02.023 db/journals/entcs/entcs134.html#SwobodaA05