FUZZY SETS AND SYSTEMS, vol. 126, no. 3, page. 311 - 324, 2002-03-16
IETE JOURNAL OF RESEARCH, vol. 48, no. 3-4, page. 227 - 235, 2002-05
FUZZY SETS AND SYSTEMS, vol. 100, no. 1-3, page. 77 - 87, 1998-11-16
SIGNAL PROCESSING, vol. 81, no. 4, page. 871 - 882, 2001-04