1. Pseudo-Euclidean Jordan Algebras
2. Lie algebras admitting a unique quadratic structure
3. Pseudo-Euclidean Alternative Algebras
4. M. Bordemann, Non-degenerate invariant bilinear forms on nonassociative algebras, Acta Math. Univ. Comenian., LXVI(2), (1997), 151-201.
5. R. D. Schafer, An Introduction to Nonassociative Algebras, Academic Press, New York, 1996.