SAMUEL BAK Rolf Kallenbach, Samuel Bak, Klaus Honnef 1978 Braunschweig, p. 40, ill.
BAK . Denkmäler unserer Träume Rolf Kallenbach 1977 München, p. 126, ill. 42.
BAK paintings of the last decade Paul T. Nagano, A. Kaufman 1976 New York, NY, p. 105, ill.
Chessmen and the End of Mankind Reuven Berman 1971 Israel, ill.