1. Extensions of tight set functions with applications in topological measure theory;Adamski;Trans. Amer. Math. Soc.,1984
2. Additive set functions in abstract spaces;Alexandroff;Mat. Sb.,1943
3. Convergence of Probability Measures;Billingsley,1968
4. Real Analysis and Probability;Dudley,2002
5. General Topology;Engelking,1989