1. Ada. (1982). Reference manual for the Ada programming language. MIL-STD 1815 edition, U.S. Department of Defense.
2. Bravenboer, M. (2008). Exercises in free syntax. Syntax definition, parsing, and assimilation of language conglomerates. PhD. Thesis, Utrecht University.
3. Program transformation with scoped dynamic rewrite rules.;M.Bravenboer;Fundamenta Informaticae,2005