@article{oai:tsukuba.repo.nii.ac.jp:00015771,
 author = {Kadowaki, Mitsuteru},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {175--191},
 title = {The limiting amplitude principle for the acoustic wave operators in two unbounded media},
 volume = {18},
 year = {1994}
}