Kelley Walter G Theory of differential equations Classical and qualitative. Kelley Walter G; Peterson Allan C - 2 - New York Springer 2010 - xi,423p. cm. ISBN: 3278.8665000000001 Standard No.: 109065 Source: 3084, 01/09/2010, New India Book Agency Textual Subjects--Topical Terms: Mathematics Dewey Class. No.: B334, Q0