His Tame algebras and integral quadratic forms, 1985, c1984: CIP t.p. (Claus Michael Ringel) galley (Fakultät für Mathematik, Univ. Bielefeld, Bielefeld, FRG) data sheet (b. 2/10/45)
LC data base, 12-19-84 (hdg.: Ringel, Claus Michael)
Representation theory of finite groups and finite-dimensional algebras, 1991: CIP t.p. (C.M. Ringel)