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Lectures: J.L. Massera: Théorie de la stabilité.- W. Wasow: Asymptotic properties of non-linear analytic differential equations.- G. Sansone: Questioni sulle equazioni non lineari.- D. Graffi: Questioni varie sulle oscillazioni non lineari.- Seminars: G. Aymerich: Oscillazioni periodiche ed isteresi oscillatoria di un sistema di Rocard a due gradi di libert