Pencils of binary quartics
Rendiconti del Seminario Matematico della Università di Padova, Tome 99 (1998), pp. 197-217. 
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Wall, C. T. C. Pencils of binary quartics. Rendiconti del Seminario Matematico della Università di Padova, Tome 99 (1998), pp. 197-217. http://archive.numdam.org/item/RSMUP_1998__99__197_0/

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