@book{Evans_2010, address={Providence, R.I.}, edition={2nd ed}, title={Partial differential equations}, volume={Graduate studies in mathematics}, publisher={American Mathematical Society}, author={Evans, Lawrence C.}, year={2010} }
@book{Farlow_1993, address={New York}, title={Partial differential equations for scientists and engineers}, volume={Dover books on advanced mathematics}, publisher={Dover Publications}, author={Farlow, Stanley J.}, year={1993} }
@book{John_1982, address={New York}, edition={4th ed}, title={Partial differential equations}, volume={Applied mathematical sciences}, publisher={Springer-Verlag}, author={John, Fritz}, year={1982} }
@book{Strauss_2008, address={New York}, edition={2nd ed}, title={Partial differential equations: an introduction}, publisher={Wiley}, author={Strauss, Walter A.}, year={2008} }