Brauer, Fred The qualitative theory of ordinary differential equations; an introduction/ [by] Fred Brauer and John A. Nohel. - New York: W.A. Benjamin, 1969. - xi, 314 p.: illus., 24 cm. - University mathematics series . Bibliography: p. 302-303. LCCN: 68025426 Subjects--Topical Terms: Differential equations.Stability. Dewey Class. No.: 515.35 / B825q