@article{939682,
      recid = {939682},
      author = {Stylianides, Andreas J., and Harel, Guershon, and Harel,  Guershon.},
      title = {Advances in Mathematics Education Research on Proof and  Proving : an International Perspective /},
      pages = {1 online resource.},
      url = {http://library.usi.edu/record/939682},
}