@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040143,
 author = {Mori, Atsuhide},
 issue = {4},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Dec},
 note = {application/pdf},
 pages = {447--454},
 title = {Global Models of Contact Forms},
 volume = {11},
 year = {2004}
}