@article{RCM_2006_40_1_a4,
     author = {Rei-Fang Yan},
     title = {Existence of global entropy solutions to a non-strictly hyperbolic system with a source},
     journal = {Revista colombiana de matematicas},
     pages = {53--64},
     year = {2006},
     volume = {40},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/RCM_2006_40_1_a4/}
}