Grüber, Klaus Michael (Autor Personal)

Goethe, J.W. Faust Salpétrière, 1975 (a.e.) p. 30 (Klaus Michael Gruber)

Carstensen, U.B. Klaus Michael Grüber, 1988: p. 125 (b. June 4, 1941 in Neckarelz; stage director)

Il ritorno d'Ulisse in patria, 2002: credits (Klaus Michael Grüber)

German Wikipedia WWW site, June 23, 2008 (Klaus Michael Grüber; b. June 4, 1941, Neckarelz; d. June 22, 2008, Belle-Île, Brittany; German director and actor)