PRODUCTION PLANNING & CONTROL, vol. 11, no. 6, page. 537 - 546, 2000-09
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS, vol. 51, no. 2, page. 163 - 173, 2000-07-24
COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, vol. 29, no. 1, page. 1 - 17, 2000-01