Rodríguez-Laso, Ángel, Rónán O’Caoimh, Lucia Galluzzo, Laure Carcaillon-Bentata, Nathalie Beltzer, Jurate Macijauskiene, Olatz Albaina Bacaicoa, et al. 2018. “Population Screening, Monitoring and Surveillance for Frailty: Three Systematic Reviews and a Grey Literature Review”. Annali dell’Istituto Superiore Di Sanità 54 (3). Rome, IT:253-62. https://annali.iss.it/index.php/anna/article/view/771.