Baker, Kenneth, “Is it a real Van Gogh? Long-stored painting gets the official nod,” San Francisco Chronicle, January 6, 2005, E1–E2.
Koldehoff, Stefan, “Birnen und Kastanien vergleichen,” Frankfurter Allgemeine, August 29, 2012.
Schaefer, Barbara, 1912–Mission Moderne: Die Jahrhundertschau des Sonderbundes, exh. cat., Cologne: Wienand, 2012, pg. 308, repr., no.1.
Koldehoff, Stefan, “Vincent van Gogh und der kampf um die moderne in Deutschland,” in 1912–Mission Moderne: Die Jahrhundertschau des Sonderbundes, exh. cat., Cologne: Wienand, 2012, pgs. 78–80, fig. 15.
Feilchenfeldt, Walter, Vincent van Gogh, The Years in France: Complete Paintings 1886–1890, London: Philip Wilson (english ed.), 2013, pgs. 287, 288.
Bailey, Martin, “San Francisco’s Van Gogh is the real deal,” The Art Newspaper (February 1, 2019): https://www.theartnewspaper.com/2019/02/01/san–franciscos–van–gogh–is–the–real–deal.
Bailey, Martin,“Fake no more: poppy painting in US museum is by Van Gogh–and has a surprise under the surface,” The Art Newspaper (March 22, 2019): https://www.theartnewspaper.com/2019/03/22/fake–no–more–poppy–painting–in–us–museum–is–by–van–goghand–has–a–surprise–under–the–surface.