@article{10_4064_ap_19_3_313_322,
     author = {Z. Kowalski},
     title = {A difference method for certain hyperbolic systems of non-linear partial differential equations of the first order},
     journal = {Annales Polonici Mathematici},
     pages = {313--322},
     publisher = {mathdoc},
     volume = {19},
     number = {3},
     year = {1967},
     doi = {10.4064/ap-19-3-313-322},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-19-3-313-322/}
}