Webster, A. G. (1966). Partial differential equations of mathematical physics (2a. ed.). Dover.
Cita Chicago (17th ed.)Webster, Arthur Gordon. Partial Differential Equations of Mathematical Physics. 2a. ed. Londres: Dover, 1966.
Cita MLA (9th ed.)Webster, Arthur Gordon. Partial Differential Equations of Mathematical Physics. 2a. ed. Dover, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.