Onder G., Landi F., Gambassi G., Liperoti R., Soldato M., Catananti C., Finne-Soveri H., Katona C., Carpenter I., Bernabei R..  2005.  Association between pain and depression among older adults in Europe: results from the Aged in Home Care (AdHOC) project: a cross-sectional study.. J Clin Psychiatry.. 66(8):982-8.

Onder G., Carpenter I., Finne-Soveri H., Gindin J., Frijters D., Henrard J.C, Nikolaus T., Topinkova E., Tosato M., Liperoti R. et al..  2012.  Assessment of nursing home residents in Europe: the Services and Health for Elderly in Long TERm care (SHELTER) study. BMC Health Serv Res. 12:5.