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© 1983 Springer-Verlag
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Betina, K. (1983). Sur l'indice des operateurs differentiels ordinaires. In: Gérard, R., Ramis, JP. (eds) Equations différentielles et systèmes de Pfaff dans le champ complexe — II. Lecture Notes in Mathematics, vol 1015. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0071348
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DOI: https://doi.org/10.1007/BFb0071348
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