출처

https://www.oss.kr/

https://news.samsung.com/kr/?p=276998

http://wiki.kldp.org/wiki.php/OpenSourceLicenseGuide

https://wiki.kldp.org/HOWTO/html/Secure-Programs-HOWTO/open-source-security.html

https://www.gnu.org/philosophy/free-software-for-freedom.html

http://dodcio.defense.gov/Open-Source-Software-FAQ/

http://www.oreilly.com/catalog/opensources/book/perens.html