@misc{oai:tsukuba.repo.nii.ac.jp:00011235,
 author = {Sato, Atsushi and 佐藤, 敦},
 month = {},
 note = {2003, 【要旨】},
 title = {On the system of nonlinear hyperbolic equations appearing in the natural science and the engineering},
 year = {2004}
}