@article{Martschink2013,
  author    = {Bastian Martschink},
  title     = {Efficiency in Large Groups: Mathematics Tutorials},
  series   = {MSOR Connections},
  volume    = {13},
  number    = {2},
  issn      = {1473-4869},
  year      = {2013},
  language  = {en}
}