Interesting paper on left-recursion in recursive descent parsers like PEGs and Packrats<p><a href="http:&#x2F;&#x2F;web.cs.ucla.edu&#x2F;~todd&#x2F;research&#x2F;pub.php?id=pepm08" rel="nofollow">http:&#x2F;&#x2F;web.cs.ucla.edu&#x2F;~todd&#x2F;research&#x2F;pub.php?id=pepm08</a>