@phdthesis{oai:tsukuba.repo.nii.ac.jp:00008296,
 author = {木下, 保 and Kinoshita, Tamotsu},
 month = {},
 note = {1999, Includes bibliographical references (p. 57-60)},
 school = {筑波大学, University of Tsukuba},
 title = {On the cauchy problem for the weakly hyperbolic equations},
 year = {2000}
}