A. de A. Kasper, V. L. D. do V. Pereira, and M. do V. P. Loch, “Spatial accessibility in schoolyards for students with visual impairment: the construction of an assessment tool”, PosFAUUSP, no. 25, pp. 292–307, Jun. 2009, doi: 10.11606/issn.2317-2762.v0i25p292-307.