TY  - JOUR
AU  - Hájek, Petr
TI  - Automatic listing of important observational statements. I
JO  - Kybernetika
PY  - 1973
SP  - 
EP  - 205
VL  - 09
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/KYB_1973__9_3_a3/
LA  - en
ID  - KYB_1973__9_3_a3
ER  -