TY  - JOUR
AU  - Jones, John jr.
TI  - On the stability of second order differential equations
JO  - Portugaliae mathematica
PY  - 1970
SP  - 81
EP  - 86
VL  - 29
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1970__29_2_115111/
LA  - en
ID  - PORMA_1970__29_2_115111
ER  -