TY  - JOUR
AU  - Grażyna Toporowska
TI  - The minimal norm problem and Pontriagin's maximum principle for Banach spaces (I)
JO  - Studia Mathematica
PY  - 1969
SP  - 175
EP  - 183
VL  - 33
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-33-2-175-183/
DO  - 10.4064/sm-33-2-175-183
LA  - en
ID  - 10_4064_sm_33_2_175_183
ER  -