[1] Web Science and Digital Libraries Research Group: 2016-11-07: Linking to Persistent Identifiers with rel="identifier" (2017-08-07 16:27:46 +09:00 版) http://ws-dl.blogspot.jp/2016/11/2016-11-07-linking-to-persistent.html

[2] draft-vandesompel-identifier-00 - Identifier: A Link Relation to Convey a Preferred URI for Referencing (2017-08-03 17:42:07 +09:00 版) https://tools.ietf.org/html/draft-vandesompel-identifier-00

[3] Web Science and Digital Libraries Research Group: 2017-08-07: rel="canonical" does not mean what you think it means ( (2017-08-09 10:58:07 +09:00)) http://ws-dl.blogspot.jp/2017/08/2017-08-07-relcanonical-does-not-mean.html