@article{MASLO_1981__31_3_a2,
     author = {Rzepecki, Bogdan},
     title = {Note on hyperbolic partial differential equations},
     journal = {Mathematica slovaca},
     pages = {243--250},
     publisher = {mathdoc},
     volume = {31},
     number = {3},
     year = {1981},
     mrnumber = {621915},
     zbl = {0482.35051},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1981__31_3_a2/}
}