%0 Journal Article %A S. Yu. Dobrokhotov %T Reduction of Hugoniot–Maslov chains for trajectories of solitary vortices of the “shallow water” equations to the Hill equation %J Teoretičeskaâ i matematičeskaâ fizika %D 1997 %P 47-66 %V 112 %N 1 %U http://geodesic.mathdoc.fr/item/TMF_1997_112_1_a1/ %G ru %F TMF_1997_112_1_a1