1. Graph theoretic constructs for control flow analysis;Allen;IBM Research Report RC-3923,1972
2. Structured programming with and without GO-TO statements;Elgot;IEEE Trans. Software Engineering,1976
3. Erratum and Corrigendum;Elgot;IEEE Trans. Software Engineering,1976
4. A semantically meaningful characterization of reducible flowchart schemes;Elgot;IBM Research Report 6656,1977
5. Flowgraph reducibility;Hecht;SIAM J. Comput.,1972