%0 Journal Article %A Anthony Joseph Tromba %T Degree Theory on Orientated Infinite Dimensional Varieties and the Morse Number of Minimal Surfaces Spanning a Curve. %J Manuscripta mathematica %D 1984 %P 139-162 %V 48 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1984__48_155023/ %F MM2_1984__48_155023