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- Martin Bravenboer. Exercises in Free Syntax. PhD thesis, Utrecht University, Utrecht, The Netherlands, January 2008.
- Lennart C. L. Kats. Supporting Language Extension and Separate Compilation by Mixing Java and Bytecode. Master's thesis, Utrecht University, Utrecht, The Netherlands, August 2007.
- Hedzer Westra. Configurable Transformations for High-Quality Automatic Program Improvement. CobolX: a case study. Master's thesis, Utrecht University, Utrecht, The Netherlands, February 2002.