Bers, L., John, F., & Schechter, M. (1964). Partial differential equations. Interscience Publishers.
Lua i Stíl Chicago (17ú heag.)Bers, Lipman, Fritz John, agus Martin Schechter. Partial Differential Equations. New York: Interscience Publishers, 1964.
Lua MLA (9ú heag.)Bers, Lipman, et al. Partial Differential Equations. Interscience Publishers, 1964.
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