%0 Journal Article %A Hacon, D. %A Mendes de Jesus, C. %A Romero Fuster, M.C. %T Fold maps from the sphere to the plane. %J Experimental mathematics %D 2006 %P 491-497 %V 15 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/EXMA_2006__15_4_224651/ %G en %F EXMA_2006__15_4_224651