Sophia Goudstikker (English Wikipedia)

German National Library 2016. "Hof-Atelier Elvira (München)". Deutschen Nationalbibliothek (in German). Leipzig and Frankfurt am Main, Germany: Katalog der Deutschen Nationalbibliothek. 26 January 2016. Retrieved 16 May 2016.

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Muellner 2006, p. 185. Muellner, Beth (2006). "The Photographic Enactment of the Early New Woman in 1890s German Women's Bicycling Magazines". Women in German Yearbook: Feminist Studies in German Literature & Culture. 22. Lincoln, Nebraska: University of Nebraska Press: 167–188. doi:10.1353/wgy.2006.0009. ISSN 1058-7446. S2CID 143547519.

Forum Homosexualität München 2014. "Chroniken" (in German). Munich, Germany: Forum Homosexualität München. 5 February 2014. Archived from the original on 16 May 2016. Retrieved 16 May 2016.

"S. Goudstikker Park · Oggersheimer Str. 11, 81539 München, Germany". S. Goudstikker Park · Oggersheimer Str. 11, 81539 München, Germany.

Pfeiffer 2014, p. 26. Pfeiffer, Zara S. (2014). "Die Geschichte der Frauenbewegung in München" [The history of women's movement in Munich] (PDF). ThemenGeschichtsPfade (in German). Munich, Germany: Landeshauptstadt München. Retrieved 16 May 2016.
Pfeiffer 2014, pp. 26–27. Pfeiffer, Zara S. (2014). "Die Geschichte der Frauenbewegung in München" [The history of women's movement in Munich] (PDF). ThemenGeschichtsPfade (in German). Munich, Germany: Landeshauptstadt München. Retrieved 16 May 2016.
Pfeiffer 2014, p. 25. Pfeiffer, Zara S. (2014). "Die Geschichte der Frauenbewegung in München" [The history of women's movement in Munich] (PDF). ThemenGeschichtsPfade (in German). Munich, Germany: Landeshauptstadt München. Retrieved 16 May 2016.
Pfeiffer 2014, p. 27. Pfeiffer, Zara S. (2014). "Die Geschichte der Frauenbewegung in München" [The history of women's movement in Munich] (PDF). ThemenGeschichtsPfade (in German). Munich, Germany: Landeshauptstadt München. Retrieved 16 May 2016.

Neuwied-Rhein Kurier 2015. "Auf Spurensuche zu Ika Freudenberg" [Looking for clues to Ika Freudenberg] (in German). Neuwied, Germany: Neuwied-Rhein Kurier. 3 September 2015. Archived from the original on 16 May 2016. Retrieved 16 May 2016.

Muellner 2006, p. 185. Muellner, Beth (2006). "The Photographic Enactment of the Early New Woman in 1890s German Women's Bicycling Magazines". Women in German Yearbook: Feminist Studies in German Literature & Culture. 22. Lincoln, Nebraska: University of Nebraska Press: 167–188. doi:10.1353/wgy.2006.0009. ISSN 1058-7446. S2CID 143547519.

Steinhäuser 2005. Steinhäuser, Frauke (29 March 2005). "Thekla Hinkel 1875, Tornquiststraße 7 (Eimsbüttel, Eimsbüttel)". Stolpertonsteine Hamburg (in German). Hamburg, Germany: Projekt Stolpertonsteine Hamburg. Archived from the original on 15 May 2016. Retrieved 15 May 2016. Betje Goudstikker was born on 06/24/1850 in Rotterdam, the eldest daughter of the art dealer Salomon Elias Goudstikker and his wife Grietje, born Klisser. She had nine siblings, her second youngest sister Sophia was enumerated around the turn of the century as one of the most prominent representatives of the Munich women's movement.

Steinhäuser 2005. Steinhäuser, Frauke (29 March 2005). "Thekla Hinkel 1875, Tornquiststraße 7 (Eimsbüttel, Eimsbüttel)". Stolpertonsteine Hamburg (in German). Hamburg, Germany: Projekt Stolpertonsteine Hamburg. Archived from the original on 15 May 2016. Retrieved 15 May 2016. Betje Goudstikker was born on 06/24/1850 in Rotterdam, the eldest daughter of the art dealer Salomon Elias Goudstikker and his wife Grietje, born Klisser. She had nine siblings, her second youngest sister Sophia was enumerated around the turn of the century as one of the most prominent representatives of the Munich women's movement.
Neuwied-Rhein Kurier 2015. "Auf Spurensuche zu Ika Freudenberg" [Looking for clues to Ika Freudenberg] (in German). Neuwied, Germany: Neuwied-Rhein Kurier. 3 September 2015. Archived from the original on 16 May 2016. Retrieved 16 May 2016.
WILPF Newsletters 2016. "Anita Augspurg" (in German). Zürich, Switzerland: Women's International League for Peace and Freedom. 2016. Archived from the original on 16 May 2016. Retrieved 16 May 2016.
Forum Homosexualität München 2014. "Chroniken" (in German). Munich, Germany: Forum Homosexualität München. 5 February 2014. Archived from the original on 16 May 2016. Retrieved 16 May 2016.

Rotterdam City Archives 1865, p. A051. "BS Geboorte met Sophia Goudstikker". Wie Was Wie (in Dutch). Rotterdam, Netherlands: Centrum voor Familiegeschiedenis. 15 January 1865. Retrieved 15 May 2016.

WILPF Newsletters 2016. "Anita Augspurg" (in German). Zürich, Switzerland: Women's International League for Peace and Freedom. 2016. Archived from the original on 16 May 2016. Retrieved 16 May 2016.

Muellner 2006, p. 185. Muellner, Beth (2006). "The Photographic Enactment of the Early New Woman in 1890s German Women's Bicycling Magazines". Women in German Yearbook: Feminist Studies in German Literature & Culture. 22. Lincoln, Nebraska: University of Nebraska Press: 167–188. doi:10.1353/wgy.2006.0009. ISSN 1058-7446. S2CID 143547519.