Hans Schedelmann "Die Grossen Buchsenmacher"; "The Double Gun Journal" Vol. 14 Issue 4 Winter 2008; Greg Martin Auctions "Exceptional Firearms, Edged Weapons and Associated Historic Material" June 3, 2002; Bonhams "Antique Arms and Armour Including the Henk L. Visser Library, Part II" April 2009; Little John Auction catalogs (January 2006, May 2009 sessions III & IV, October 2010 sessions I-III, October 2011, May 2011, May 2012, October 2012; January 2005 session I-III); Peter Finer catalogs (1999, 2003, 2005, 2010); Sotheby's "Edged Weapons, Militaria, Antique & Modern Firearms and Aeronautica" April 1998 (2 copies); Christie's "Antique Arms and Armour" May 1989; Bonhams "Antique Arms and Armour Including the Collections of the Late Mrs. G.E.P. How, the Late John Wilmot and the Late Danny Wing" July 2007; "The Gun Report" (issues June 2002, September 2002); "Muzzle Blasts" March 2004; Christie's "Modern Sporting Guns and Vintage Firearms" September 1983; Sotheby's "The Visser Collection Part II" June 1991; Bonhams "The Scottish Sale" August 2009; Butterfield's "Antique Arms & Armor and Modern Sporting Guns" November 2002; Christie's "Fine Antique Firearms from the W. Keith Neal Collection": November 1995; James D. Julia March 2014 catalog no. 2; Christie's "Antique Arms and Armour" July 1983. Provenance: The Norman R. Blank Collection