PATTERN RECOGNITION LETTERS, vol. 24, no. 15, page. 2815 - 2821, 2003-11
PATTERN RECOGNITION LETTERS, vol. 23, no. 13, page. 1549 - 1558, 2002-11
PATTERN RECOGNITION, vol. 37, no. 2, page. 337 - 349, 2004-02
LECTURE NOTES IN COMPUTER SCIENCE, vol. 2668, page. 391 - 400, 2003-01