TY  - GEN
AU  - Coppel,W.A
TI  - Disconjugacy
T2  - Lecture notes in mathematics (Berlin)
SN  - 0387055843 (New York)
U1  - 515.35 
PY  - 1971///
CY  - Berlin, New York
PB  - Springer-Verlag
KW  - Differential equations
N1  - Cuprinde bibliografie si index
ER  -