TY  - BOOK
AU  - Albeverio S
AU  - Kurasov P
TI  - Singular perturbations of differential operators: solvable Schrodinger type operators
SN  - 0-521-77912-X
U1  - 515.35 
PY  - 2000///
CY  - Cambridge
PB  - CUP
KW  - Differential operators
KW  - Perturbation theory
ER  -