Bibliographie zur Geschichte der Kreuzzüge, 1960 title page (Hans Eberhard Mayer)
Das Itinerarium peregrinorum, 1962 title page (Hans Eberhard Mayer)
Die Siegel der lateinischen Könige von Jerusalem, 2014 title page (Hans Eberhard Mayer)
German Wikipedia, viewed November 4, 2014 (Hans Eberhard Mayer; born February 2, 1932, in Nürnberg; German historian; joined the editorial staff of Monumenta Germaniae Historica in 1956; taught history at Universität Kiel beginning in 1967; he is a leading expert on the history of the Crusades)
Outremer, 1982 title page (H.E. Mayer) page 101 (Hans Eberhard Mayer, University of Kiel)