FUZZY SETS AND SYSTEMS, vol. 100, no. 1-3, page. 77 - 87, 1998-11-16
IMAGE AND VISION COMPUTING, vol. 16, no. 9-10, page. 653 - 667, 1998-07
IMAGE AND VISION COMPUTING, vol. 16, no. 3, page. 181 - 189, 1998-03-16
PATTERN RECOGNITION, vol. 31, no. 1, page. 31 - 39, 1998-01