Hollis, S. (2002). Differential equations with boundary value problems. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Hollis, Selwyn. Differential Equations with Boundary Value Problems. Upper Saddle River, NJ: Prentice Hall, 2002.
Lua MLA (9ú heag.)Hollis, Selwyn. Differential Equations with Boundary Value Problems. Prentice Hall, 2002.
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