1. Local dimension of normal spaces;Dowker;Quart. J. Math. Oxford,1955
2. Quelques propriétés caractéristiques de la dimension;Eilenberg;Fund. Math.,1938
3. General Topology;Engelking,1977
4. Extension of continuous functions in βN;Fine;Bull. Amer. Math. Soc.,1960
5. Rings of Continuous Functions;Gillman,1960