TY  - JOUR
AU  - Gerhardt, Hans-Detlef
TI  - The beginning of a mathematical simulation theory
JO  - Kybernetika
PY  - 1977
SP  - 320
EP  - 332
VL  - 13
IS  - 5
UR  - http://geodesic.mathdoc.fr/item/KYB_1977_13_5_a1/
LA  - en
ID  - KYB_1977_13_5_a1
ER  -