- “Various Licenses and Comments about Them - GNU Project § The Unlicense”. Free Software Foundation. 2017년 2월 10일에 확인함.
- Chestek, Pamela (2020년 6월 16일). “[License-review] Request for legacy approval: The Unlicense”. 2020년 9월 8일에 원본 문서에서 보존된 문서.
There is general agreement that the document is poorly drafted. It is an attempt to dedicate a work to the public domain (which, taken alone, would not be approved as an open source license) but it also has wording commonly used for license grants.There was some discussion about the legal effectiveness of the document, in particular how it would operate in a jurisdiction where one cannot dedicate a work to the public domain. The lawyers who opined on the issue, both US and non-US, agreed that the document would most likely be interpreted as a license and that the license met the OSD. It is therefore recommended for approval.
- Balter, Ben (2015년 3월 9일). “Open source license usage on GitHub.com”. github.com. 2015년 11월 21일에 확인함.
1 MIT 44.69%, 2 Other 15.68%, 3 GPLv2 12.96%, 4 Apache 11.19%, 5 GPLv3 8.88%, 6 BSD 3-clause 4.53%, 7 Unlicense 1.87%, 8 BSD 2-clause 1.70%, 9 LGPLv3 1.30%, 10 AGPLv3 1.05% (30 million × 2% × 17% = 102k)