Zainun, Zuraida, et al. “Subjective Visual Vertical (SVV) Finding in Healthy Adults: Comparison Between Clockwise (CW) and Counterclockwise (CCW) Condition”. Bangladesh Journal of Medical Science, vol. 21, no. 2, Feb. 2022, pp. 243-8, doi:10.3329/bjms.v21i2.58055.