1. Éléments aléatoires dans les espaces vectoriels topologiques;Ahmad;Ann. Inst. H. Poincaré Sect. B,1965
2. On the strong law of large numbers;Beck,1963
3. Eléments de Mathématique, Livre VI;Bourbaki,1965
4. Barycenters of measures on certain noncompact convex sets;Bourgin;Trans. Amer. Math. Soc.,1971