Acta Informatica 30(4) July, 1993

• Lehmann, Thomas and Loeckx, Jacques (1993) Lehmann, Thomas and Loeckx, Jacques "OBSCURE: A Specification Language for Abstract Data Types" pp303-350
• Maggiolo-Schettini, A., Winkowski, J., (1996) Maggiolo-Schettini, A., Winkowski, J., "A Kernel Language for Programmed Rewriting of (Hyper)Graphs" pp. 523- 546.