Ibba, M.; Cossu, F.; Spanu, V.; Virdis, S.; Spanu, C.; Scarano, C.; De Santis, E. P. Listeria Monocytogenes Contamination in Dairy Plants: Evaluation of Listeria Monocytogenes Environmental Contamination in Two Cheese-Making Plants Using Sheeps Milk. Ital J Food Safety 2013, 2, e31.