%0 Journal Article %A Montesinos-Amilibia, A. %T Transformations between surfaces in $\mathbb{R}^4$ with flat normal and/or tangent bundles. %J Revista matemática iberoamericana %D 2008 %P 71-90 %V 24 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/RMI_2008_2008_1_a3/ %G en %F RMI_2008_2008_1_a3