Applied Soft Computing. 13: 4841–4848. doi:10.1016/j.asoc.2011.06.016. Archived from the original (PDF) on July 8, 2011. CS1 maint: Multiple names: authors list (link) ↑ Madhusudhanan Chandrasekaran; Krishnan Narayanan; Shambhu Upadhyaya (March 2006).