1. On a special class of p-groups;Blackburn;Acta Math.,1958
2. On prime-power groups with two generators;Blackburn,1958
3. The Hp-problem for groups with certain central factors cyclic;Gallian,1974
4. On the Hughes conjecture;Gallian;J. Algebra,1975
5. The Hughes conjecture and groups with absolutely regular subgroups or ECF-subgroups;Gallian,1975