Gardellini, A., R. Nardi, V. Arienti, D. Panuccio, R. Bernardi, and V. Pedone. “Aging, Patient-Bed Management and Overcrowding in the Medical Departments”. Italian Journal of Medicine, vol. 3, no. 1, Apr. 2013, pp. 35-43, doi:10.4081/itjm.2009.35.