Bellio, A.; Gallina, S.; Traversa, A.; Monfardini, S.; Bianchi, D. M.; Adriano, D.; Decastelli, L. Microbiological Criteria in Public Catering: Sampling and Auditing Experiences in Canteens and Cafeterias in Piedmont. Ital J Food Safety 2013, 1, 11-16.