General Sources

Benkler, Y., 2005. Common Wisdom: Peer Production of Educational Materials, COSL Press. Available at: http://www.benkler.org/Common_Wisdom.pdf [Accessed March 12, 2009].
Berlin Declaration on Open Access to Knowledge in the Sciences and Humanities, Conference on Open Access to Knowledge in the Sciences and Humanities, 20-22 October 2003: Berlin. Available at: http://oa.mpg.de/openaccess-berlin/berlindeclaration.html [Accessed May 8, 2009].
Burrus, C.S., 2007. 'Connexions: An Open Educational Resource for the 21st Century. Educational Technology Magazine: The Magazine for Managers of Change in Education, 47(6), 19-22. Available at: http://cnx.org/news/BurrusEdTecArticle.pdf [Accessed March 24, 2009].
Cape Town Open Education Declaration. 2008 (January 22). Available at: http://www.capetowndeclaration.org/read-the-declaration [Accessed July 2, 2009].
Center for Educational Research and Innovation (CERI), 2007. Giving Knowledge for Free: The Emergence of Open Educational Resources, Organisation for Economic Co-operation and Development. Available at: http://www.oecd.org/dataoecd/35/7/38654317.pdf [Accessed May 8, 2009].
'FAQ'. Connexions. Available at: http://cnx.org/aboutus/ [Accessed March 25, 2009].

K-12 Sources

CK-12 Foundation, 'About Us'. CK-12 - Next Generation Textbooks. Available at: http://www.ck12.org/aboutus.html [Accessed May 6, 2009].
Park, J., 2009 (April 28). 'CK-12 Foundation’s Neeru Khosla on Open Textbooks'. Commons News. Available at: http://creativecommons.org/weblog/entry/14141 [Accessed May 6, 2009].
Paul, R., 2009 (May 8). 'California open source digital textbook plan faces barriers'. Ars Technica. Available at: http://arstechnica.com/open-source/news/2009/05/california-launches-open-source-digital-textbook-initiative.ars [Accessed May 11, 2009].
Schwarzenegger, A., 2009 (June 6). Digital textbooks can save money, improve learning. San Jose Mercury News. Available at: http://www.mercurynews.com/opinion/ci_12536333?nclick_check=1 [Accessed June 11, 2009].
'What is NROC?' National Repository of Online Courses. Available at: http://www.montereyinstitute.org/nroc/nroc.html [Accessed May 6, 2009].