Stem derivor$ (all stems)
2 papers:
- PEPM-1992-Burton #program transformation
- Program Transformation by Derivor Manipulations (CTPB), pp. 90–97.
- ESOP-1988-GiegerichS #parsing #pattern matching
- Code Selection Techniques: Pattern Matching, Tree Parsing, and Inversion of Derivors (RG, KS), pp. 247–268.