Congruences In Regular Categories. Xavier Caicedo; W.D. Burgess — 1981 Revista colombiana de matematicas
On Conrad's partial order relation on semiprime rings and semigroups. W.D. Burgess; R. Raphael — 1978 Semigroup forum
Compactifications, C ( X ) and ring epimorphisms. Burgess, W.D.; Raphael, R. — 2006 Theory and Applications of Categories [electronic only]