Some algebraic applications of graded categorical group theory. Cegarra, A.M.; Garzón, A.R. — 2003 Theory and Applications of Categories [electronic only]
Diagonal fibrations are pointwise fibrations. Cegarra, A.M.; Remedios, J. — 2007 Journal of Homotopy and Related Structures
Cohomology of groups with operators. Cegarra, A.M.; García-Calcines , J.M.; Ortega, J.A. — 2002 Homology, Homotopy and Applications