1. A. Weil, Basic Number Theory, Springer-Verlag, New York (1968).
2. N. Bourbaki, Algebra: Rings, Modules and Forms, Hermann et Cie., Paris (1965).
3. S. Wang, ?On the commutator group of a simple algebra,? Am. J. Math.,72, No. 2, 323?334 (1950).
4. T. Nakayama and Y. Matsushima, ?über die multiplikative Gruppe einer p-adischen Divisionsalgebra,? Proc. Jpn. Acad.,19, 622?628 (1943).
5. V. I. Yanchevskii, ?Commutator groups of simple algebras with surjective reduced norm,? Dokl. Akad. Nauk SSSR,221, No. 5, 1056?1058 (1975).