Heydorn, V. D. (1985). Maler in Hamburg. Christians.
Lua i Stíl Chicago (17ú heag.)Heydorn, Volker Detlef. Maler in Hamburg. Hamburg: Christians, 1985.
Lua MLA (8ú heag.)Heydorn, Volker Detlef. Maler in Hamburg. Christians, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.