@conference{Fargier93b, author = "Didier Dubois and H{\'e}l{\`e}ne Fargier and Henri Prade", address = "Chambery, France", booktitle = "Proc. of IJCAI-93/SIGMAN Workshop on Knowledge-based Production Planning, Scheduling and Control", month = "aug", title = "{U}sing fuzzy constraints in job-shop scheduling", year = "1993", }