%0 Journal Article %A Demetrios Christodoulou %T The instability of naked singularities in the gravitational collapse of a scalar field. %J Annals of mathematics %D 1999 %V 149 %N 1 %U http://geodesic.mathdoc.fr/articles/10.2307/121023/ %R 10.2307/121023 %F 10_2307_121023