Kallir 1998: "Initialed 'S' and dated, lower right. [...] Provenance: Kornfeld & Klipstein, June 10, 1976, sale 157, lot 905; *Alfons Keller. Exhibitions: Bern, 1956, no. 10, ill.; *St. Gallen, 1957, no. 95. Comments: The subject has been identified by Anton Peschka, Jr., as his mother, Gertrude Schiele Peschka."
Quelle: Jane Kallir: Egon Schiele. The complete works. Expanded Edition. New York 1998; Michael Wladika: Dossier Dr. Heinrich Rieger. Egon Schiele, Sich Aufstützende in Unterwäsche. o.O. 2009. S.26ff.; www.artloss.com
