Kleiner, Carolyn (July 24, 2000). "Van Gogh's vanishing act". Mysteries of History. U.S. News & World Report. Archived from the original on December 8, 2013. Retrieved May 7, 2011.
Kleiner, Carolyn (July 24, 2000). "Van Gogh's vanishing act". Mysteries of History. U.S. News & World Report. Archived from the original on December 8, 2013. Retrieved May 7, 2011.