TY  - GEN
AU  - Lakshmikantham
AU  - Bernfeld,Stephen R.
TI  - An introduction to nonlinear boundary value problems
T2  - Mathematics in science and engineering
SN  - 0120931508
U1  - 515.35 
PY  - 1974///
CY  - [S.l.]
PB  - Academic Press
ER  -