Iranian Mathematical Society (IMS) Bulletin of the Iranian Mathematical Society 1017-060X 38 2 2012 07 15 Applications of epi-retractable modules469 477 en Bashishth Muni Pandeya Department of Applied Mathematics, Institute of Technology, Banaras Hindu University, Varanasi-221005, India. Avanish Kumar Chaturvedi Department of Mathematics, Jaypee Institute of Information Technology, (Deemed University) A-10, Sector-62, Noida-201307 (UP), India Ashok Ji Gupta Department of Applied Mathematics, Institute of Technology, Banaras Hindu University, Varanasi-221005, India. 2010 09 17