Encoding. WHATWG. sec. 5.2 Names and labels. 27 January 2015 [4 February 2015]. (原始内容存档于2015-02-04). Historical trends in the usage of character encodings
Unicode/UTF-8-character table (页面存档备份,存于互联网档案馆) displays UTF-8 in a variety of formats(with Unicode and HTML encoding information) Online Tool for URL encoding/decoding