@article{MZ_1995__219_2_174774,
     author = {Mitsuhiro Nakao},
     title = {Engergy decay for the quasilinear wave equation with viscosity.},
     journal = {Mathematische Zeitschrift},
     pages = {289--300},
     publisher = {mathdoc},
     volume = {219},
     number = {2},
     year = {1995},
     zbl = {0835.35094},
     url = {http://geodesic.mathdoc.fr/item/MZ_1995__219_2_174774/}
}