%0 Journal Article %A Coppens, Marc %A Martens, Gerriet %T Secant spaces and Clifford's theorem %J Compositio Mathematica %D 1991 %P 193-212 %V 78 %N 2 %I Kluwer Academic Publishers %U http://www.numdam.org/item/CM_1991__78_2_193_0/ %G en %F CM_1991__78_2_193_0