@article{Gregoriades2011,
  pages = {4:02, 22},
  title = {The descriptive set-theoretic complexity of the set of points of
           continuity of a multi-valued function},
  author = {Gregoriades, Vassilios},
  journal = {Log. Methods Comput. Sci.},
  number = {4},
  year = {2011},
  volume = {7},
}