TY  - JOUR
AU  - D. Willett
TI  - On the oscillatory behavior of the solutions of second order linear differential equations
JO  - Annales Polonici Mathematici
PY  - 1968
SP  - 175
EP  - 194
VL  - 21
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-21-2-175-194/
DO  - 10.4064/ap-21-2-175-194
LA  - en
ID  - 10_4064_ap_21_2_175_194
ER  -