%0 Journal Article %A O. F. Men'shikh %T Conservation Laws of Second Order for the Born–Infeld Equation and Other Related Equations %J Matematičeskie zametki %D 2008 %P 874-881 %V 84 %N 6 %U http://geodesic.mathdoc.fr/item/MZM_2008_84_6_a5/ %G ru %F MZM_2008_84_6_a5