Contribution to the theory of certain non-linear differential equations.
Series: Portugal. Missoes geograficas e de investigações do ultramar, Junta das. Estudos ensaios e documentos -- 73.; Estudos, ensaios e documentos -- 73.
Publisher: Junta de investigaçoes do ultramar
Published: 1960
Place of publication: Lisboa
Language: eng
Number of pages: 123
Subjects: Differential equations.
Notes: Complements his Existence and uniqueness of the periodic solution of and equation for autonomous oscillations.

Bibliography: p. 121-123.