^Nash, Jay Robert. The Great Pictorial History of World Crime, Volume 2. Rowman & Littlefield. 2004: 364. ISBN 1-928831-20-6. "Gustavus Katterfelto launched a successful medical swindle. Passing himself off as a worldly philosopher and scientist, Katterfelto swindled Londoners with his sleight of hand tricks and medicine show for nearly three years. In 1872, he claimed to have invented the Solar Microscope, which he used to detect a deadly plague similar to the Black Death."
^Partnoy, Frank. The Match King: Ivar Kreuger, The Financial Genius Behind a Century of Wall Street Scandals. PublicAffairs. 2010. ISBN 978-1586488123.
Riordan, Timothy B. (2009). Prince of Quacks: The Notorious Life of Dr. Francis Tumblety, Charlatan and Jack the Ripper Suspect. McFarland. ISBN978-0786444335
Porter, Roy. (2003). Quacks: Fakers and Charlatans in Medicine. NPI Media Group. ISBN978-0752425900
Stratmann, Linda. (2010). Fraudsters and Charlatans: A Peek at some of History's Greatest Rogues. The History Press. ISBN978-0752457109