TY  - JOUR
AU  - Taam, Choy-Tak
TI  - Non-oscillation and comparison theorems of linear differential equations with complex-valued coefficients
JO  - Portugaliae mathematica
PY  - 1953
SP  - 57
EP  - 72
VL  - 12
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1953__12_2_114714/
LA  - en
ID  - PORMA_1953__12_2_114714
ER  -