Acióly-Scott Interval Categories. - Roberto Callejas-Bedregal; Benjamín René Callejas Bedregal (WMF, 2003)

T-Norms on Bounded Lattices: t-norm Morphisms and Operators. - Benjamín René Callejas Bedregal; Hélida Salles Santos; Roberto Callejas-Bedregal (FUZZ-IEEE, 2006)

A Generalized Class of T-norms From a Categorical Point of View. - Benjamín R. C. Bedregal; Hélida S. Santos; Roberto Callejas-Bedregal (FUZZ-IEEE, 2007)

Bounded Lattice T-Norms as an Interval Category. - Benjamín R. C. Bedregal; Roberto Callejas-Bedregal; Hélida S. Santos (WoLLIC, 2007)