INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH, vol. 31, no. 4, page. 771 - 789, 1993-04
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH, vol. 32, no. 10, page. 2361 - 2379, 1994-10
IEEE TRANSACTIONS ON ROBOTICS AND AUTOMATION, vol. 11, no. 3, page. 413 - 421, 1995-06
JOURNAL OF MANUFACTURING SYSTEMS, vol. 14, no. 4, page. 252 - 263, 1995-01