Mota, D. D. C. de F.; Pimenta, C. A. de M.; Fitch, M. I. Fatigue Pictogram: An Option for Assessing Fatigue Severity and Impact. Rev. Esc. Enferm. USP 2009, 43 (spe), 1080-1087. https://doi.org/10.1590/S0080-62342009000500012.