Some remarks on Maltsev and Goursat categories. - A. Carboni; G. M. Kelly; Maria-Cristina Pedicchio (Appl. Categorical Struct., 1993)

On Localization and Stabilization for Factorization Systems. - A. Carboni; George Janelidze; G. M. Kelly; R. Paré (Appl. Categorical Struct., 1997)