Attribution Share-Alike (CC BY-SA)
This license allows others to alter, transform, and generate works derived from this project – even for commercial ends – as long as OERT is attributed and the new creations are equally licensed. This license is often compared with other free and open software licenses, like the “copyleft”. Because new works based on this license bear the same terms, the derivative works are also allowed for commercial uses. This license is used by Wikipedia, and it is recommended for those materials that can benefit with the incorporation of content from Wikipedia and other similarly-licensed projects.
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