TY  - BOOK
AU  - Gramchev, Todor V
AU  - Popivanov, Petar R
TI  - Partial differential equations: Approximate solutions in sca
T2  - Mathematical research
U1  - 515.353/GRA 
PY  - 2000///
CY  - Berlin
PB  - Wiley-VCH
KW  - Differential equations, Partial
KW  - Mathematics
ER  -