1. AAAS (American Association for the Advancement of Science). (2011). Vision and Change in Undergraduate Biology Education: A Call to Action. Washington, DC: AAAS. Retrieved from http://visionandchange.org/files/2013/11/aaas-VISchange-web1113.pdf
2. Allen, I. E., & Seaman, J. (2014). Opening the Curriculum: Open Educational Resources in U.S. Higher Education, 2014. Babson Survey Research Group. Retrieved from http://www.onlinelearningsurvey.com/reports/openingthecurriculum2014.pdf
3. An OER COUP: College teacher and student perceptions of open educational resources;Journal of Interactive Media in Education,2013
4. Bliss, T. J., Hilton III, J., Wiley, D. A., & Thanos, K. (2013b). The cost and quality of open textbooks: Perceptions of community college faculty and students. First Monday, 18, 1.
5. Boyd, J. (2016). OpenStax already saved students $39 million this academic year. Rice University News & Media. Retrieved from http://news.rice.edu/2016/01/20/openstax-already-saved-students-39-million-this-academic-year