TY  - JOUR
AU  - S. Brzychczy
TI  - On a certain property of a transformation in Hilbert space in connection with the theory of differential equations
JO  - Colloquium Mathematicum
PY  - 1967
SP  - 143
EP  - 146
VL  - 18
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-18-1-143-146/
DO  - 10.4064/cm-18-1-143-146
LA  - en
ID  - 10_4064_cm_18_1_143_146
ER  -