1. [11] Ordman Edward T. , “Free k–groups and free topological groups”, General Topology and Appl. (to appear).
2. [10] Ordman Edward T. , “Free products of topological groups which are kω –spaces”, Trans. Amer. Math. Soc. (to appear).
3. Classifying spaces and infinite symmetric products
4. On free topological groups;Markov;Amer. Math. Soc. Transl.,1962
5. The Topology of CW Complexes