[1] Adler-32 - Wikipedia (2017-09-10 17:43:02 +09:00) https://ja.wikipedia.org/wiki/Adler-32

[2] RFC 1950 - ZLIB Compressed Data Format Specification version 3.3 (2017-09-17 17:15:13 +09:00) https://tools.ietf.org/html/rfc1950#page-6