TY  - BOOK
AU  - Kauffman,R.M.
AU  - Read,Thomas T.
AU  - Zettl,Anton
AU  - Dold,A.
AU  - Eckmann,B.
TI  - The deficiency index problem for powers of ordinary differential expressions
SN  - 0387085238 :
U1  - 510.82 
PY  - 1977///
CY  - Berlin
PB  - Springer-Verlag
KW  - Boundary value problems
KW  - Weyl theory
KW  - Differential operators
ER  -