Gilbarg, D., & Trudinger, N. S. (2001). Elliptic partial differential equations of second order (2nd ed., rev. 3rd printing.). New York: Springer.
Chicago-стиль цитированияGilbarg, David, và Neil S. Trudinger. Elliptic Partial Differential Equations of Second Order. 2nd ed., rev. 3rd printing. New York: Springer, 2001.
MLA-цитированиеGilbarg, David, và Neil S. Trudinger. Elliptic Partial Differential Equations of Second Order. 2nd ed., rev. 3rd printing. New York: Springer, 2001.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.