Schneck, Robert R. (1999)

Theory and Applications of Categories [electronic only]

Siehler, Jacob (2003)

Algebraic & Geometric Topology

Yves André, Bruno Kahn, Peter O’Sullivan (2002)

Rendiconti del Seminario Matematico della Università di Padova

Brown, R., Sivera, R. (2007)

Journal of Homotopy and Related Structures

Kock, J. (2007)

Journal of Homotopy and Related Structures

Day, Brian, Pastro, Craig (2008)

The New York Journal of Mathematics [electronic only]

Coquereaux, Robert, Isasi, Esteban, Schieber, Gil (2010)

SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]

Davydov, Alexei (2007)

Theory and Applications of Categories [electronic only]