@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040350, author = {Oshima, Toshio}, issue = {1}, journal = {Journal of mathematical sciences, the University of Tokyo}, month = {}, note = {application/pdf}, pages = {1--75}, title = {Commuting families of differential operators invariant under the action of a Weyl group}, volume = {2}, year = {1995} }