M. H. Lenardt, M. A. Binotto, N. H. K. Carneiro, C. Cechinel, S. E. Betiolli, and T. M. Lourenço, “ Handgrip strength and physical activity in frail elderly ”, Rev. Esc. Enferm. USP, vol. 50, no. 1, pp. 86–92, Feb. 2016, doi: 10.1590/S0080-623420160000100012.