@article{MZM_2008_84_6_a5,
     author = {O. F. Men'shikh},
     title = {Conservation {Laws} of {Second} {Order} for the {Born--Infeld} {Equation} and {Other} {Related} {Equations}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {874--881},
     publisher = {mathdoc},
     volume = {84},
     number = {6},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2008_84_6_a5/}
}