%0 Journal Article %A Per Sjölin %T Spherical harmonics and maximal estimates for the Schrödinger equation %J Annales Fennici Mathematici %D 2005 %P 393-406 %V 30 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AFM_2005_30_2_a10/ %G en %F AFM_2005_30_2_a10