Geodesic
Remarks on the Asymptotic Behaviour of Perturbed Linear Systems†
Glasgow mathematical journal, Tome 11 (1970) no. 1, p. 84

Voir la notice de l'article provenant de la source Cambridge University Press

Remarks 1, 3 and 5 are incorrect as stated. They should be supplemented by the following observations:(i) In case the perturbing term is linear in y, i.e. f(t, y) = B(t)y, the conclusion of Theorem 1 will follow from Lemma 1 when applied to equation (15) if we assume, instead of (6),The hypothesis given in Trench's theorem is sufficient to imply (*) but not (6). A similar comment applies to Remark 5. 
Wong, James S. W. Remarks on the Asymptotic Behaviour of Perturbed Linear Systems†. Glasgow mathematical journal, Tome 11 (1970) no. 1, p. 84. doi: 10.1017/S0017089500000860
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[†] † Vol. 10 (1969), 116–120

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