1. Normal subgroups in a finite group;Berkovich;Soviet Math. Dokl.,1968
2. A generalization of the theorems of Hall and Blackburn and their applications to nonregular p-groups;Berkovich;Math. USSR Izv.,1971
3. On a special class of p-groups;Blackburn;Acta Math.,1958
4. Generalizations of certain elementary theorems on p-groups;Blackburn,1961
5. Some combinatorial and symbol manipulations programs in group theory;Cannon,1970