TY - GEN AU - Brauer,Fred AU - Nohel,John A. TI - The qualitative theory of ordinary differential equations: an introduction T2 - University mathematics series U1 - 515.35 PY - 1969/// CY - New York PB - W.A. Benjamin KW - Differential equations KW - Stability N1 - Bibliography: p. 302-303 ER -