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In ricordo del nostro amico Giovanni Sacchi-Landriani
This research has been done within the framework of the 40% project ALGEBRAIC GEOMETRY
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Colombo, E., Pirola, G.P. Some density results for curves with non-simple jacobians. Math. Ann. 288, 161–178 (1990). https://doi.org/10.1007/BF01444527
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DOI: https://doi.org/10.1007/BF01444527