TY  - DATA
AU  - W. A. Coppel
TI  - Disconjugacy
T2  - Lecture Notes in Mathematics
SN  - 9783540369059
PY  - 1971///
CY  - Heidelberg
PB  - Springer Berlin
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/BFb0058618
ER  -