@article{LyuQianSchulze2015,
  author    = {Xiaojing Lyu and Tao Qian and Bert-Wolfgang Schulze},
  title     = {Order filtrations of the edge algebra},
  journal   = {Journal of pseudo-differential operators and applications},
  volume    = {6},
  number    = {3},
  pages     = {279 -- 305},
  doi       = {10.1007/s11868-015-0126-8},
  year      = {2015},
}