@article{Pirhayati2015,
  author    = {Mohammad Pirhayati},
  title     = {Boundary symbols in the cone algebra},
  journal   = {Journal of pseudo-differential operators and applications},
  volume    = {6},
  number    = {3},
  pages     = {307 -- 339},
  doi       = {10.1007/s11868-015-0123-y},
  year      = {2015},
}