@article{COCV_2020__26_1_A121_0,
     author = {Zha, Dongbing and Peng, Weimin},
     title = {Remarks on nonlinear elastic waves with null conditions},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     publisher = {EDP-Sciences},
     volume = {26},
     year = {2020},
     doi = {10.1051/cocv/2020039},
     mrnumber = {4188824},
     zbl = {1459.35276},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/cocv/2020039/}
}