Asger Jorn, Untitled Circa 1950/51 Signed in the lower centre: Jorn 40 × 49,7 cm Brush and pen and India ink on paper Formerly Robert Dahlmann-Olsen, Copenhagen Asger Jorn 1914 bis 1973. Cologne, Galerie Rudolf Zwirner, and Berlin, Galerie Michael Haas, 1991, cat. no. 1, ill.