@article{oai:tsukuba.repo.nii.ac.jp:00015883,
 author = {Niizeki, Syozo},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {299--317},
 title = {On the Cauchy problem for a semi-linear hyperbolic system and its traveling wave-like solutions},
 volume = {5},
 year = {1981}
}