Aznar Casanova J. A. ., Matsushima E. H., Ribeiro Filho N. P. . y Da Silva J. A. (2006). One-Dimensional and Multi-Dimensional Studies of the Exocentric Distance Estimates in Frontoparallel Plane, Virtual Space, and Outdoor Open Field. The Spanish Journal of Psychology, 9(2), 273-284. https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0606220273A