%0 Journal Article %A K. P. Stanyukovich %T One-dimensional flow of an ultrarelativistic gas %J Doklady Akademii Nauk %D 1961 %P 590-593 %V 139 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_139_3_a20/ %G ru %F DAN_1961_139_3_a20