Leif, W. (1976). Four Swedish Photographers: Yngve Baum, Ola Terje, Jens S. Jensen, Hans Alenius. Modern Museet.
Lua i Stíl Chicago (17ú heag.)Leif, Wigh. Four Swedish Photographers: Yngve Baum, Ola Terje, Jens S. Jensen, Hans Alenius. Stockholm: Modern Museet, 1976.
Lua MLA (8ú heag.)Leif, Wigh. Four Swedish Photographers: Yngve Baum, Ola Terje, Jens S. Jensen, Hans Alenius. Modern Museet, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.