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PATTERN RECOGNITION LETTERS, vol. 23, no. 11, page. 1337 - 1347, 2002-09
IMAGE AND VISION COMPUTING, vol. 16, no. 3, page. 181 - 189, 1998-03-16
PATTERN RECOGNITION LETTERS, vol. 18, no. 7, page. 641 - 648, 1997-07