Petrovsky, I. G. (1991). Lectures on partial differential equations. Dover.
Lua i Stíl Chicago (17ú heag.)Petrovsky, Ivan Georgievich. Lectures on Partial Differential Equations. Nueva York: Dover, 1991.
Lua MLA (9ú heag.)Petrovsky, Ivan Georgievich. Lectures on Partial Differential Equations. Dover, 1991.
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