Reduction to normal form of a self-adjoint linear transformation with respect to a pseudo-unitary or a pseudo-Euclidean inner product. Ahdout, Shahla; Rothman, Sheldon — 2006 Revista Colombiana de Matemáticas
The Algbraic von Neumann Kernel and Linear Algebraic Groups. Helen Strassberg; Sheldon Rothman — 1981 Mathematische Zeitschrift