Iranian Mathematical Society (IMS) Bulletin of the Iranian Mathematical Society 1017-060X 39 1 2013 03 01 Maximal subsets of pairwise non-commuting elements of some finite p-groups187 192 en A. Azad Arak University, Iran S. Fouladi Kharazmi University, Iran R. Orfi Arak University, Iran 2011 03 01 pairwise non-commuting elements Finite p-group AC-group