Anton Hirschig (English Wikipedia)

C.E.G. ten Houte de Lange, 'Hirschig', in: De Nederlandsche Leeuw Archived July 24, 2011, at the Wayback Machine 111 (1994), p 206-21 (a comprehensive genealogy of the Hirschig family to the present day)

museumbredius.nl

RKD database Archived September 7, 2010, at the Wayback Machine (confusion of A.M. Hirschig with M.A. Hirschig)

'Herinneringen aan Vincent van Gogh' Oud Holland Archived 2012-02-26 at the Wayback Machine 1934 Vol 51 p. 44

"Family tree of Vincent Van Gogh" (PDF). vangoghletters.org.
"Letter 888". Vincent van Gogh. The Letters. Amsterdam: Van Gogh Museum.
"Search result". Vincent van Gogh. The Letters. Amsterdam: Van Gogh Museum.
van Crimpen, Han (1988). "Friends remember Van Gogh in 1912". In Haruo Arikawa; et al. (eds.). Vincent van Gogh. International Symposium Tokyo – October 17–19, 1985. Tokyo. pp. 73–90.{{cite book}}: CS1 maint: location missing publisher (link)

C.E.G. ten Houte de Lange, 'Hirschig', in: De Nederlandsche Leeuw Archived July 24, 2011, at the Wayback Machine 111 (1994), p 206-21 (a comprehensive genealogy of the Hirschig family to the present day)
Inventaris van het archief van de familie De Lange, 1737-1987 Archived March 14, 2010, at the Wayback Machine (includes a family history)
RKD database Archived September 7, 2010, at the Wayback Machine (confusion of A.M. Hirschig with M.A. Hirschig)
"Gifts to Museums". Bredius Museum. Archived from the original on 2010-03-06.
'Herinneringen aan Vincent van Gogh' Oud Holland Archived 2012-02-26 at the Wayback Machine 1934 Vol 51 p. 44

"none". Le Régional. Beaumont-sur-Oise: Private archive of M. Jean-Pierre Mantel, Auvers-sur-Oise. 7 August 1890.