TY  - BOOK
AU  - Codington, Earl A.
AU  - Snoo De, Hendrik S. V.
TI  - Regular boundary value problems associated with Paris of ordinary differential expression  
T2  - Lecture notes in mathematics
SN  - 3540107061
PY  - 1981///
CY  - New York
PB  - Spinger-verlag
KW  - Boundary value problems
KW  - Calculas
KW  - Differntial equations
KW  - Mathematics
ER  -