- Conversation with the author 2020-08-18.
- "Pax Intrantibus - Pax Eceuntibus".
- Historischer Ortsrundgang: Haus „zum Winterholler Isi” / Historic Town Tour: The „zum Winterholler Isi” House (Plaque on the wall of Bankgasse 5). Garmisch-Partenkirchen, Germany, Fremdenverkehrsverein und Verein für Geschichte, Kunst- und Kulturgeschichte: "Isidor Winterholler, a painter from Unterwindach near Landsberg, acquired the house in 1939 and established an inn on the ground floor. He and his son, Franz painted many of the murals in Garmisch-Partenkirchen.
Lüftlmalerei
A street by street guide to the fresco and facade paintings in the Garmisch-Partenkirchen district