Gilbarg, D., & Trudinger, N. S. (1977). Elliptic partial differential equations of second order. Springer-Verlag.
Chicago Edition CitationGilbarg, David, and Neil S. Trudinger. Elliptic Partial Differential Equations of Second Order. N Y: Springer-Verlag, 1977.
MLA Edition CitationGilbarg, David, and Neil S. Trudinger. Elliptic Partial Differential Equations of Second Order. Springer-Verlag, 1977.
Warning: These citations may not always be 100% accurate.