1. Abellán García A, Pujol Rodríguez R (2016). Un perfil de las personas mayores en España, 2016. Indicadores estadísticos básicos. Madrid: Informes Envejecimiento en red nº 14. [Publication data:22/01/2016]; Available on: http://cort.as/ijpw
2. Topinkova E (2008). Aging, disability and frailty. Ann Nutr Metab, 52 Suppl 1:6-11.
3. Bousquet J, Kuh D, Bewick M, Standberg T, Farrell J, Pengelly R, et al. (2015). Operational Definition of Active and Healthy Ageing (AHA): A Conceptual Framework. J Nutr Health Aging, 19: 955-960.
4. Stambler I (2015). Stop Aging Disease! ICAD 2014. Aging Dis, 6: 76-94.
5. Rowe JW, Fried LP (2013). Incorporating frailty into clinical practice and clinical research. J Frailty Aging, 2: 126-127.