@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040039,
 author = {Kowata, Atsutaka and Moriwaki, Masayasu},
 issue = {3},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Dec},
 pages = {355--395},
 title = {Invariant Differential Operators on the Schrödinger Model for the Minimal Representation of the Conformal Group},
 volume = {18},
 year = {2011}
}