Richard Gottheil, Joseph Jacobs, "Crusades, The," in: The Jewish Encyclopedia Vol. IV (New, York: Funk and Wagnalls 1903), pp. 378-379. Retrieved: 30 July 2021. Georg Heinrich Pertz, ed. (1844). Monumenta Germaniae Historica: Scriptorum (in Latin). Vol. Tomus VI. Hannover: Hahn. p. 729.
Philipp Jaffé; Wilhelm Wattenbach; Ernst Dümmler (1866). Bibliotheca rerum germanicarum: Monumenta moguntina (in Latin). Vol. III. Berlin: Weidmann. p. 377. Clement does not say how the Jews came into possession of the object, or how he had come to know about the incident.
Jaffé; Wattenbach; Dümmler. Bibliotheca rerum germanicarum: Monumenta moguntina. pp. 381–382.: Ad hoc malum extirpandum Halberstadensis ecclesia consensu domini nostri regis, consilio archiepiscoporum et episcoporum et voluntate aliorum principum, electione quoque cleri et populi fratrem nostrum Mogontine ecclesie canonicum suscepit episcopum."
Richard Gottheil, Joseph Jacobs, "Crusades, The," in: The Jewish Encyclopedia Vol. IV (New, York: Funk and Wagnalls 1903), pp. 378-379. Retrieved: 30 July 2021. Georg Heinrich Pertz, ed. (1844). Monumenta Germaniae Historica: Scriptorum (in Latin). Vol. Tomus VI. Hannover: Hahn. p. 729.
