@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040067,
 author = {Chiba, Yasuo},
 issue = {4},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Mar},
 pages = {461--500},
 title = {A construction of pure solutions for degenerate hyperbolic operators},
 volume = {16},
 year = {2010}
}