Luo, Xun, Robert V. Kenyon, Derek G. Kamper, Daniel J/ Sandin, and Thomas A. DeFanti. 2009. “On the Determinants of Size-Constancy in a Virtual Environment”. International Journal of Virtual Reality 8 (1):43-51. https://doi.org/10.20870/IJVR.2009.8.1.2712.