%0 Journal Article %A H. S. Harutyunyan %T Chord length distribution function for lens %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2011 %P 17-22 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2011_3_a2/ %G en %F UZERU_2011_3_a2