[1] [CITE@en[Base 36 - Wikipedia, the free encyclopedia]]
( ([TIME[2013-12-26 13:09:34 +09:00]] 版))
<http://en.wikipedia.org/wiki/Base_36>


[2] [CITE@en[draft-multiformats-multibase-02 - The Multibase Data Format]], [TIME[2020-12-21T02:06:34.000Z]], [TIME[2020-12-29T05:52:41.555Z]] <https://tools.ietf.org/html/draft-multiformats-multibase-02>

[3] [CITE@en-US[Address IPFS on the Web | IPFS Docs]], [TIME[2023-08-10T03:03:52.000Z]] <https://docs.ipfs.tech/how-to/address-ipfs-on-web/#native-urls>

>Some user agents will force-lowercase the CID component of URL-like address. To ensure interop with existing libraries and software, use case-insensitive CID encoding. Use of CIDv1 in Base32 or Base36 is advised.