Springer Undergraduate Mathematics Series(SUMS) SUMS11 Analytic Methods for Partial Differential Equations, Gwynne A. EvansJonathan M. BlackledgePeter D. Yardley (1999).djvu
Springer Undergraduate Mathematics Series(SUMS) SUMS11 Analytic Methods for Partial Differential Equations, Gwynne A. EvansJonathan M. BlackledgePeter D. Yardley (1999).pdf