TY  - BOOK
AU  - Shubin,M.A (ed)
TI  - Partial differential equations VII: spectral theory of differential operators
T2  - Encyclopaedia of mathematical sciences 64
SN  - 3-540-54677-4
U1  - 4.04+5.03+10.02 
PY  - 1994///
CY  - Berlin
PB  - Springer
ER  -