@article{oai:tsukuba.repo.nii.ac.jp:00017649,
 author = {Hirosawa, Fumihiko and Nakazawa, Hideo},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {217--232},
 title = {Rapid decay of the total energy for dissipative wave equations},
 volume = {27},
 year = {2003}
}