1. On the non-existence of elements of Hopf invariant one;Adams;Ann. of Math.,1960
2. On the dimension of normal spaces;Alexandroff;Proc. Roy. Soc. London,1947
3. On mappings connected with topological groups;Arhangel'skiǐ;Dokl. Akad. Nauk SSSR,1968
4. Topological spaces and their continuous mappings;Arhangel'skiǐ,1968
5. On relationships between invariants of topological groups and their subspaces;Arhangel'skiǐ;Uspekhi Mat. Nauk,1980