@article{CMUC_2009__50_2_a5,
     author = {Jel{\'\i}nek, Ji\v{r}{\'\i} and Pra\v{z}\'ak, Dalibor},
     title = {On the sign of {Colombeau} functions and applications to conservation laws},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {245--264},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {2009},
     mrnumber = {2537834},
     zbl = {1212.46061},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2009__50_2_a5/}
}