TY  - BOOK
AU  - Powers,David L.
TI  - Boundary value problems: and partial differential equations.-6th ed. 
SN  - 9780123747198
PY  - 2010///
CY  - Amsterdam, Boston
PB  - Elsevier/Academic Press
KW  - Boundary value problems
KW  - Textbooks
KW  - Differential equations, Partial
ER  -