TY  - GEN
AU  - Kauffman,Robert McKenzie
AU  - Read,Thomas Thornton
AU  - Zettl,Anton
TI  - The deficiency index problem for powers of ordinary differential expressions
T2  - Lecture notes in mathematics
SN  - 0387085238
U1  - 510.8 
PY  - 1977///
CY  - Berlin, New York
PB  - Springer-Verlag
KW  - Boundary value problems
KW  - Weyl theory
KW  - Differential operators
N1  - Cuprinde bibliografie si index
ER  -