TY  - JOUR
AU  - Philip Hartman
TI  - Logarithmic derivatives of solutions of disconjugate differential equations
JO  - Annales Polonici Mathematici
PY  - 1974
SP  - 173
EP  - 187
VL  - 29
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-29-2-173-187/
DO  - 10.4064/ap-29-2-173-187
LA  - en
ID  - 10_4064_ap_29_2_173_187
ER  -