%0 Book Section %A Popa, Sorin %T Free-independent sequences in type $II_1$ factors and related problems %B Recent advances in operator algebras - Orléans, 1992 %A Collectif %S Astérisque %D 1995 %P 187-202 %N 232 %I Société mathématique de France %U http://www.numdam.org/item/AST_1995__232__187_0/ %G en %F AST_1995__232__187_0