1. D.L. Kettenis, HL1 Reference Manual
2. The HCS-1 Hybrid Compiler: How well does it work, special symposium on advanced hybrid computing;Rook,1975
3. Simulation Languages and Hybrid Compilers: Principles and Techniques;Elzas,1975
4. HL-1 or towards unique language for each continuous system simulation (an introduction to the HCS-1 compiler system);Elzas,1973
5. M.S. Elzas, C.J.H. Nieuwenhuis, Report 1001 Computer Centre Wageningen University.