@article{EJDE_2003__2003__a40,
     author = {Nguyen Huu Tho and Tran Duc Van},
     title = {Hopf-type estimates for solutions to {Hamilton-Jacobi} equations with concave-convex initial data},
     journal = {Electronic journal of differential equations},
     year = {2003},
     volume = {2003},
     zbl = {1035.35022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a40/}
}