B-saturated Hull Classes in ℓ-groups and Covering Classes of Spaces. - Ricardo E. Carrera; Anthony W. Hager (Appl. Categorical Struct., 2015)

Pointfree Functorial Polar Functions. - Ricardo E. Carrera (Appl. Categorical Struct., 2016)

Bounded Equivalence of Hull Classes in Archimedean Lattice-Ordered Groups with Unit. - Ricardo E. Carrera; Anthony W. Hager (Appl. Categorical Struct., 2016)

Morphisms and Pushouts in Compact Normal Joinfit Frames. - Ricardo E. Carrera (Appl. Categorical Struct., 2022)

Some Modifications of Hull Operators in Archimedean Lattice-Ordered Groups with Weak Unit. - Ricardo E. Carrera; Anthony W. Hager (Appl. Categorical Struct., 2023)

Functorial Polar Functions in Compact Normal Joinfit Frames. - Ricardo E. Carrera (Appl. Categorical Struct., 2024)