According to Bernhard Peter, a statistical study shows that while the lion appears 11,223 times and the star appears 10,677 times, ermine appears only 193 times and vair only 26 times, in the Siebmacher and Deutschen Wappenrolle (Band 1–63). Even the squirrel appears more often than its fur (42 instances, compared to 26).
Bernhard Peter (2009-01-04). "Pelzwerk". Kunst und Kultur der Wappen (in German). Archived from the original on 2011-07-19. Retrieved 2009-04-05.
Bernhard Peter (2008-09-23). "Schnittige Teilungen". Kunst und Kultur der Wappen (in German). Archived from the original on 2011-07-19. Retrieved 2009-04-05.
nd.edu
rarebooks.nd.edu
"Charges of the Field". Heraldic Dictionary. University of Notre Dame. 2005-01-14. Retrieved 2009-01-31.
Plates 32, 145 and 167 respectively of Johann Siebmacher's Wappenbuch von 1605, Orbis Edition (1999), Munich, or see Neuenberg and Roth on plate 144.
web.archive.org
Bernhard Peter (2009-01-04). "Pelzwerk". Kunst und Kultur der Wappen (in German). Archived from the original on 2011-07-19. Retrieved 2009-04-05.
Bernhard Peter (2008-09-23). "Schnittige Teilungen". Kunst und Kultur der Wappen (in German). Archived from the original on 2011-07-19. Retrieved 2009-04-05.