References
- El-Mallah , M. L. 1988 . Absolute valued algebras with an involution . Arch. Math. , 51 : 39 – 49 .
- El-Mallah , M. L. 1990 . Absolute valued algebras containing a central idempotent . J. Algebra , 128 ( 1 ) : 180 – 187 .
- El-Mallah , M. L. 2003 . Semi-algebraic absolute valued algebras with an involution . Comm. Algebra , 31 ( 7 ) : 3135 – 3141 .
- Milnor , J. 1958 . On the parallelizability of the spheres . Bull. Am. Math. Soc. , 64 : 87 – 89 .
- #Communicated by E. Zelmanov.