[P5] The TEI Consortium, TEI P5: Guidelines for Electronic Text Encoding and Interchange. https://tei-c.org/guidelines/p5/

[2.9.0] The TEI Consortium, TEI P5: Guidelines for Electronic Text Encoding and Interchange, Release 2.9.0 .

[FA2RE] Alexander Meduna, Lukáš Vrábel, and Petr Zemek Converting Finite Automata to Regular Expressions http://www.fit.vutbr.cz/~izemek/grants.php.cs?file=%2Fproj%2F589%2FPresentations%2FPB05-Converting-FAs-To-REs.pdf&id=589

[TPoRE] Nikita Popov The true power of regular expressions https://nikic.github.io/2012/06/15/The-true-power-of-regular-expressions.html

[REBNF] Michael Wollowski Regular ExpressionsBackus-Naur Form (BNF) https://www.rose-hulman.edu/class/se/csse404/schedule/day2/02-REBNF.pdf

[NFA2RE] Convert NFA to regular expression https://girdhargopalbansal.blogspot.com/2013/06/convert-nfa-to-regular-expression.html

[DFA2RE] DFA to Regular Expression | Examples Akshay Singhal https://www.gatevidyalay.com/dfa-to-regular-expression-examples-automata/

[REGGE] Regular expression generation through grammatical evolution Ahmet Cetinkaya https://dl.acm.org/citation.cfm?id=1274089

[CSS3] Selectors Level 3 W3C Recommendation 29 September 2011 W3C http://www.w3.org/TR/2011/REC-css3-selectors-20110929/

[CSS3new] Selectors Level 3 W3C Recommendation 06 November 2018 W3C https://www.w3.org/TR/2018/REC-selectors-3-20181106/

[sel4] Selectors Level 4 W3C Working Draft, 21 November 2018 W3C https://www.w3.org/TR/2018/WD-selectors-4-20181121/

[BCP47] Tags for Identifying Languages IETF https://tools.ietf.org/html/bcp47