Knihs, Everton, Nizam Omar, and Ismar Frango Silveira. “Legal Aspects in the Collaborative Production of Open Digital Resources”. International Journal of Learning, Teaching and Educational Research 15, no. 6 (May 30, 2016): 78–92. Accessed July 31, 2026. http://www.ijlter.myres.net/index.php/ijlter/article/view/923.