TY  - JOUR
AU  - Andrzej Karafiat
TI  - The problem of the number of switches in parabolic equations with control
JO  - Annales Polonici Mathematici
PY  - 1977
SP  - 289
EP  - 316
VL  - 34
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-34-3-289-316/
DO  - 10.4064/ap-34-3-289-316
LA  - en
ID  - 10_4064_ap_34_3_289_316
ER  -