Achterberg WP, Gambassi G, Finne-Soveri H, Liperoti R, Noro A, Frijters DHM, Cherubini A, Dell'Aquila G, Ribbe MW.  2010.  Pain in European long-term care facilities: cross-national study in Finland, Italy and The Netherlands. Pain. 148(1):70-74.

Gray L, Ariño-Blasco S, Berg K, Bula C, Gambassi G, Heckman G, Jónsson PV, Kergoat M-J, Leff B, Martin-Khan M et al..  2013.  interRAI Clinical and Management Applications Manual: For Use with the interRAI Acute Care Assessment Instrument. :84.

Sgadari A, Lapane KL, Mor V, Landi F, Bernabei R, Gambassi G.  2000.  Oxidative and nonoxidative benzodiazepines and the risk of femur fracture. The Systematic Assessment of Geriatric Drug Use Via Epidemiology Study Group. J Clin Psychopharmacol. 20(2):234-9.