%0 Journal Article %A Tolksdorf, Peter %T On minimal surfaces with free boundaries in given homotopy classes %J Annales de l'I.H.P. Analyse non linéaire %D 1985 %P 157-165 %V 2 %N 3 %I Gauthier-Villars %U http://www.numdam.org/item/AIHPC_1985__2_3_157_0/ %G en %F AIHPC_1985__2_3_157_0