@article{oai:tsukuba.repo.nii.ac.jp:00018379,
 author = {Sadamatsu, Takashi},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {75--83},
 title = {On a necessary condition for the wellposedness of the Cauchy problem for some degenerate parabolic equations},
 volume = {28},
 year = {2004}
}