Licensing update rolled out in all Wikimedia wikis （页面存档备份，存于互联网档案馆） on wikimedia.org by Erik Moeller on June 30th, 2009 "Perhaps the most significant reason to choose CC-BY-SA as our primary content license was to be compatible with many of the other admirable endeavors out there to share and develop free knowledge"
Licensing update rolled out in all Wikimedia wikis （页面存档备份，存于互联网档案馆） on wikimedia.org by Erik Moeller on June 30th, 2009 "Perhaps the most significant reason to choose CC-BY-SA as our primary content license was to be compatible with many of the other admirable endeavors out there to share and develop free knowledge"
