@article{ChangQianSchulze2015,
  author    = {Der-Chen Chang and Tao Qian and Bert-Wolfgang Schulze},
  title     = {Corner Boundary Value Problems},
  journal   = {Complex analysis and operator theory},
  volume    = {9},
  number    = {5},
  pages     = {1157 -- 1210},
  doi       = {10.1007/s11785-014-0424-9},
  year      = {2015},
}