These are some important and/or interesting references. No claim is made that this is an exhaustive list.

[Brabrand2010] Brabrand, Claus, Robert Giegerich, and Anders Möller. “Analyzing Ambiguity of Context-Free Grammars.” Science of Computer Programming, volume 75, number 3. Elsevier. (2010). doi:10.1016/j.scico.2009.11.002.

[Grune2016] Grune, Dick, et. al. Modern Compiler Design, second edition. Springer Publishing Company. ISBN: 978-1-4939-4472-9. 01 May 2016.

[Loup] Loup. Earley Parsing Explained.

[Pemberton2022] Pemberton, Steven. “Invisible XML Specification.” Published by the Invisible Markup Community Group on the web at

[Schwarz2012] Schwarz, Keith. Advanced Parsing Techniques. CS143: Compilers. Stanford University.

[Scott2008] Scott, Elizabeth. SPPF-Style Parsing From Earley Recognisers. Electronic Notes in Theoretical Computer Science. 203, 2, p. 53-67, Apr 2008.

[Scott2010] Scott, Elizabeth and Adrian Johnstone. GLL Parsing. Electronic Notes in Theoretical Computer Science. 253, p. 177-189, 2010.

[Scott2019] Scott, Elizabeth, Adrian Johnston, and L. Thomas van Binsbergen. Derivation representation using binary subtree sets. Science of Computer Programming. 175, p. 63-84 22 p. 15 Apr 2019.