@article{SinclairBussideVilliersetal.2016,
  author    = {Nathalie Sinclair and Maria G. Bartolini Bussi and Michael de Villiers and Keith Jones and Ulrich Kortenkamp and Allen Leung and Kay Owens},
  title     = {Recent research on geometry education: an ICME-13 survey team report},
  journal   = {ZDM : The International Journal on Mathematics Education},
  volume    = {48},
  pages     = {691 -- 719},
  doi       = {10.1007/s11858-016-0796-6},
  year      = {2016},
}