@conference{CMP2012,
author = "Gianpiero Costantino and Fabio Martinelli and Marinella Petrocchi",
booktitle = "Intl. Conference on Internet and Web Applications and Services",
crossref = "DBLP:conf/IEEEares/2012cd",
isbn = " 978-1-61208-200-4",
note = "partners: CNR; projects: NESSoS, Aniketos,   TIER: C, no citations",
pages = "188-193",
title = "{A} study on rating services based on users' category",
year = "2012",
}