@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040246,
 author = {Tri, Nguyen Minh},
 issue = {3},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {},
 note = {application/pdf},
 pages = {437--452},
 title = {Remark on Non-Uniform Fundamental and Non Smooth Solutions of Some Classes of Differential Operators with Double Characteristics},
 volume = {6},
 year = {1999}
}