M. Villegas Yarleque, F. Carrasco Choque, R. Hidalgo Armestar, and G. F. Villegas Aguilar, “Catastrophic health expenditure: the case of households with adults over 60 years of age in Peru – 2019”, uct, vol. 25, no. 111, pp. 191-200, Dec. 2021.