Old theorem - new proof. (A vieux théorème démonstration nouvelle.) (French)
Bull. - Soc. Enseign. Neuchâtel. Sci., No. 19, 1-7 (1996).
1
Codierung. (A propos de codage.) (French)
Bull. - Soc. Enseign. Neuchâtel. Sci., No. 17, 9-14 (1994).
2
Chaos, im Ueberblick. T. 2. (Le chaos, un apercu. Deuxieme partie.) (French)
Bull. - Soc. Enseign. Neuchâtel. Sci., No. 16, 1-10 (1993).
3