@article{RM_1995_50_1_a15,
     author = {I. Veinan and Yu. G. Rykov and Ya. G. Sinai},
     title = {The {Lax--Oleinik} variational principle for some one-dimensional systems of quasilinear equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {220--222},
     publisher = {mathdoc},
     volume = {50},
     number = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1995_50_1_a15/}
}