http://www.ruanyifeng.com/blog/2011/05/how_to_choose_free_software_licenses.html
https://web.liferay.com/community/forums/-/message_boards/message/4775410
http://www.cnblogs.com/Wayou/p/how_to_choose_a_license.html
http://www.ruanyifeng.com/blog/2011/05/how_to_choose_free_software_licenses.html
https://web.liferay.com/community/forums/-/message_boards/message/4775410
http://www.cnblogs.com/Wayou/p/how_to_choose_a_license.html