1. On the concept of fiber space;Hurewicz, Witold;Proc. Nat. Acad. Sci. U.S.A.,1955
2. Espaces fibrés en sphères et carrés de Steenrod;Thom, René;Ann. Sci. Ecole Norm. Sup. (3),1952
3. Homologie singulière des espaces fibrés. Applications;Serre, Jean-Pierre;Ann. of Math. (2),1951
4. On the factors and fiberings of manifolds;Young, Gail S., Jr.;Proc. Amer. Math. Soc.,1950
5. On metrization of topological spaces;Smirnov, Yu. M.;Amer. Math. Soc. Translation,1953