Caballero-Flores, José Daniel. 2023. “Depression, Self-Esteem Disorders and Emotional Distress During the COVID-19 Pandemic in the Elderly Population of Mexico City and the Metropolitan Area of the Valley of Mexico (a Preliminary Study)”. International Journal of Research in Medical Sciences 11 (4):1066-72. https://doi.org/10.18203/2320-6012.ijrms20230845.