%0 Journal Article %A V. G. Boltyanskii %A P. S. Soltan %T Illumination from within of the boundary of a convex body %J Sbornik. Mathematics %D 1972 %P 87-94 %V 16 %N 1 %U http://geodesic.mathdoc.fr/item/SM_1972_16_1_a6/ %G en %F SM_1972_16_1_a6