Viaene, V. 1998. R. Boudens, L. Gevers, B. Doyle, Two cardinals. John Henry Newman, Désiré Joseph Mercier, L. Gevers, B. Doyle, ed. BMGN - Low Countries Historical Review. 113, 4 (Jan. 1998), 591–593. DOI:https://doi.org/10.18352/bmgn-lchr.4862.