@article{oai:tsukuba.repo.nii.ac.jp:00016160,
 author = {Miyake, Masatake},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {85--98},
 title = {An operator L=aI-D^j_tD^<-j-α>_x-D^<-j>_tD^<j+α>_x and its nature in Gevrey functions},
 volume = {17},
 year = {1993}
}