S. Umamaheswari, T. Purusothaman, N P. Supriya and Arun Thundyill Saseendran
Asian Journal of Information Technology 15 ( 19 ): 3801 - 3809 , 2016
S. Umamaheswari and Jayashree Krishnan
International Business Management 8 ( 4 ): 214 - 221 , 2014