Hough, PA, and Mariette Nel. “Postural Risks and Musculoskeletal Discomfort of Three Preferred Positions During Laptop Use Amongst Students”. South African Journal of Occupational Therapy, vol. 47, no. 1, May 2017, pp. 3-8, https://doi.org/10.17159/2310-3833/2017/v47n1a2.