@article{interactiveintelligenttutoringfor,
  title = {Interactive, Intelligent Tutoring for Auxiliary Constructions in Geometry Proofs},
  author = {Ke Wang and Zhendong Su},
  year = {2017},
  eprint = {1711.07154},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1711.07154v1},
}