G. M. F. Pimenta, M. A. da S. M. C. da Costa, L. H. T. Gonçalves, and Ângela M. Alvarez, “Profile of the caregiver of dependent elderly family members in a home environment in the city of Porto, Portugal”, Rev. Esc. Enferm. USP, vol. 43, no. 3, pp. 609–614, Sep. 2009, doi: 10.1590/S0080-62342009000300016.