PATTERN RECOGNITION, vol. 35, no. 10, page. 2109 - 2124, 2002-10
PATTERN RECOGNITION LETTERS, vol. 23, no. 11, page. 1337 - 1347, 2002-09
IETE JOURNAL OF RESEARCH, vol. 48, no. 3-4, page. 227 - 235, 2002-05
FUZZY SETS AND SYSTEMS, vol. 126, no. 3, page. 311 - 324, 2002-03-16