TY  - JOUR
AU  - Materna, Pavel
TI  - An intensional approach to questions
JO  - Kybernetika
PY  - 1979
SP  - 
EP  - 192
VL  - 15
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/KYB_1979__15_3_a0/
LA  - en
ID  - KYB_1979__15_3_a0
ER  -