Richard Gerstl art links 

Richard Gerstl: On the Danube Canal
Source: Wikimedia Commons (see "image archives" below)

Original works by Richard Gerstl available for purchase at art galleries worldwide
 
 

Kunsthaus Zug, Switzerland (in German)  
Gruppenbildnis mit Schönberg, 1907

MUMOK - Museum Moderner Kunst Stiftung Ludwig Wien, Vienna
(You need to click the "right" arrow three times)

Neue Galerie Museum for German and Austrian Art, New York City
Click "Collection" > "View the collection" > "Artists" > "Richard Gerstl"

Österreichische Galerie Belvedere, Vienna

 

Wikimedia Commons Image Database  

Artyst, Peintures du Monde (in French)  

Bildindex der Kunst und Architektur (in German)  
(a welcome screen is displayed for a couple of seconds before the search results appear)

 

AEIOU - Austrian Kulturinformationssystem (in German)  

 

Grove Dictionary of Art Online (excerpt)  

Union List of Artist Names (Getty Museum)  
Reference sheet with basic information about the artist and pointers to other references.

Oxford Dictionary of Art (eNotes)   NEW!