%0 Journal Article %A V. G. Danilov %A V. P. Maslov %A V. M. Shelkovich %T Algebras of the singularities of singular solutions to first-order quasi-linear strictly hyperbolic systems %J Teoretičeskaâ i matematičeskaâ fizika %D 1998 %P 3-55 %V 114 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1998_114_1_a0/ %G ru %F TMF_1998_114_1_a0