Rough approximations of multi-fuzzy sets. - Gayathri Varma; Sunil Jacob John (Int. J. Granul. Comput. Rough Sets Intell. Syst., 2014)

On Multi-Fuzzy Rough Sets, Relations, and Topology. - Gayathri Varma; Sunil Jacob John (Int. J. Fuzzy Syst. Appl., 2019)