1 - Theory of ordinary differential equations
Coddington, Earl A. (1920-....)   /   Levinson, Norman (1912-1975)

Cote : [47 COD 55]

2 - Contributions of the theory of nonlinear oscillations. Volume II
Lefschetz, Solomon (1884-1972)   /   Cartwright, Mary Lucy (1900-1998)   /   Coddington, Earl A   /   Levinson, Norman (1912-1975)

Cote : [47 LEF 52-2]