TY  - BOOK
AU  - Coppel,W.A.
TI  - Disconjugacy
T2  - Lecture notes in mathematics
SN  - 0387055843 (Springer Verlag New York)
PY  - 1971///
CY  - Berlin, New York
PB  - Springer-Verlag
KW  - Differential equations
N1  - Bibliography: p. [139]-147
ER  -