PATTERN RECOGNITION, vol. 31, no. 1, page. 31 - 39, 1998-01
PATTERN RECOGNITION LETTERS, vol. 18, no. 7, page. 641 - 648, 1997-07
PATTERN RECOGNITION LETTERS, vol. 15, no. 7, page. 649 - 658, 1994-07
PATTERN RECOGNITION LETTERS, vol. 15, no. 6, page. 587 - 593, 1994-06