Biog. nat. de l'Acad. roy. ... Belgique. (Mercier, Désiré; archevêque de Malines, philosophe)
Código social de Malines, 1945 t.p. (Cardeal Mercier) p. 12 (Cardeal Desidério Mercier)
His Cardinal Mercier's philosophical essays, 2000 p. 4 of cover (Désiré Joseph Mercier; 1851-1926; fnd. & 1st pres., Institute of Philosophy, Catholic University of Leuven)
Lettre pastorale au clergé ..., 1909 p. 404 (Desideratus Josephus Card. Mercier)
New Cath. encycl. (Mercier, Désiré Joseph; Cardinal, archbishop of Malines; Cardinal Désiré Mercier, b. Nov. 21, 1851 in Braine-l'Alleud, d. Jan. 23, 1926, Brussels)