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1 - 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]

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2 - Contributions to the theory of nonlinear oscillations
Lefschetz, Solomon (1884-1972) (Ed.)   /   Cesari, Lamberto (1910-1990) (Ed.)   /   Lasalle, J. (Ed.)

Cote : [47 LEF 50]