no. 2
Secant spaces and Clifford's theorem
Compositio Mathematica, Tome 78 (1991) no. 2, pp. 193-212 
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     author = {Coppens, Marc and Martens, Gerriet},
     title = {Secant spaces and {Clifford's} theorem},
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     year = {1991},
     publisher = {Kluwer Academic Publishers},
     volume = {78},
     number = {2},
     mrnumber = {1104787},
     zbl = {0741.14035},
     language = {en},
     url = {https://www.numdam.org/item/CM_1991__78_2_193_0/}
}
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Coppens, Marc; Martens, Gerriet. Secant spaces and Clifford's theorem. Compositio Mathematica, Tome 78 (1991) no. 2, pp. 193-212. https://www.numdam.org/item/CM_1991__78_2_193_0/

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