1. Actualit\'{e}s Scientifiques et Industrielles [Current Scientific and Industrial Topics], No. 1189;Bourbaki, N.,1953
2. G. Choquet, Question 0007, Intermédiaire des Recherches Mathématiques vol. 1 (1945) p. 4.
3. Recent developments in the theory of locally convex vector spaces;Dieudonné, J. A.;Bull. Amer. Math. Soc.,1953