1. RASCAL: a domain specific language for source code analysis and manipulation;Klint,2009
2. The syntax definition formalism SDF—reference manual;Heering;SIGPLAN Not.,1989
3. Using RSCRIPT for software analysis;Klint,2008
4. An empirical study of PHP feature usage: a static analysis perspective;Hills,2013
5. Evolution of dynamic feature usage in PHP;Hills,2015