Willinsky, J., and C. Baron. “What Should Students Pay for University Course Readings?: An Empirical, Economic, and Legal Analysis”. Canadian Journal of Higher Education, vol. 51, no. 4, Dec. 2021, pp. 40-53, https://www.cjhe.test.sfulib7.publicknowledgeproject.org/index.php/cjhe/article/view/189159.