@inproceedings{chesnevar04afirst, author = "Carlos I. Ches{\~n}evar and Ana G. Maguitman and Guillermo R. Simari", title = "A first approach to argument-based recommender systems based on defeasible logic programming", booktitle = "In Proceeding of the 10th International Workshop on Non-Monotonic Reasoning", year = "2004", month = "June", address = "Whistler, Canada", pages = "109--117", }