O'Neil, Peter V. Beginning partial differential equations / Peter V. O'Neil - 3rd Edition - America : Wiley, 2014 - 438 p. ; 28 cm. ISBN: 9781118629949 Subjects--Topical Terms: Differential equationsPartial Subjects--Index Terms: Chương trình vi phân Giải tích Dewey Class. No.: 515.35 / ONE