@MISC{HowToProcessOCLASTs,
  title = {How to process {OCL} {A}bstract {S}yntax {T}rees, {E}clipse {T}echnical {A}rticle},
  author = {Miguel Garcia},
  year = {2007},
  note = {\url{http://www.eclipse.org/articles/article.php?file=Article-HowToProcessOCLAbstractSyntaxTrees/index.html}}
}