Descent equivalence Xiuzhan Guo; Manuela Sobral; Walter Tholen — 2004 Cahiers de Topologie et Géométrie Différentielle Catégoriques
Direct sums of J -rings and radical rings. Guo, Xiuzhan — 1995 International Journal of Mathematics and Mathematical Sciences
Stable meet semilattice fibrations and free restriction categories. Cockett, J.R.B.; Guo, Xiuzhan — 2006 Theory and Applications of Categories [electronic only]