I believe PEGS are a better, modern approach to parsing. 
PEGS are only mentioned in the article, with no links.<p>Here&#x27;s the PEG paper:
<a href="http:&#x2F;&#x2F;www.brynosaurus.com&#x2F;pub&#x2F;lang&#x2F;peg.pdf" rel="nofollow">http:&#x2F;&#x2F;www.brynosaurus.com&#x2F;pub&#x2F;lang&#x2F;peg.pdf</a>