Frantsvog, Dean A. “All Rights Reversed: A Study Of Copyleft, Open-Source, And Open-Content Licensing”. Contemporary Issues in Education Research (CIER) 5, no. 1 (January 23, 2012): 15–22. Accessed July 17, 2024. https://clutejournals.com/index.php/CIER/article/view/6782.