@conference {DBLP:conf/tc11-5/AsirelliRT98,
	title = {The Constraint Operator of MedLan: Its Efficient Implementation and Use},
	booktitle = {IICIS},
	year = {1998},
	pages = {41-55},
	author = {Patrizia Asirelli and Chiara Renso and Franco Turini}
}
