1. Artin, E., Tate, J.: Class Field Theory. Mimeographed Notes. Harvard University 1961
2. Cassels, J.W.S., Fröhlich, A.: Algebraic Number Theory. Proceedings of a Conference (Brighton 1965), London-New York: Academic Press 1967
3. Garbanati, D.A.: The Hasse Norm Theorem forl-Extensions of the Rationals. In: Number Theory and Algebra (ed. H. Zassenhaus), pp. 77?90. London-New York: Academic Press 1977
4. Hoechsmann, K.: Zum Einbettungsproblem. J. Reine Angew. Math.229, 81?106 (1968)
5. Huppert, B.: Endliche Gruppen I, Berlin-Heidelberg-New York: Springer1967