TY  - JOUR
AU  - Z. Polniakowski
TI  - On the differential equation \(y''-a(x)y =0\)
JO  - Commentationes Mathematicae
PY  - 1970
SP  -  241
EP  - 248
VL  - 13
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14708/cm.v13i2.5676/
DO  - 10.14708/cm.v13i2.5676
LA  - pl
ID  - 10_14708_cm_v13i2_5676
ER  -