Generalized homotopy in C-categories. F. J. Díaz, J. Remedios, S. Rodríguez-Machín (2001) Extracta Mathematicae
Global actions, groupoid atlases and applications. Bak, A., Brown, R., Minian, G., Porter, T. (2006) Journal of Homotopy and Related Structures
Globular realization and cubical underlying homotopy type of time flow of process algebra. Gaucher, Philippe (2008) The New York Journal of Mathematics [electronic only]