TY  - JOUR
AU  - Grzegorczyk, Andrzej
TI  - Assertions depending on time and corresponding logical calculi
JO  - Compositio Mathematica
PY  - 1968
SP  - 83
EP  - 87
VL  - 20
PB  - Wolters-Noordhoff Publishing
UR  - http://www.numdam.org/item/CM_1968__20__83_0/
LA  - en
ID  - CM_1968__20__83_0
ER  -