@article{WollnySchneiderDiMitrietal.2021,
  author    = {Sebastian Wollny and Jan Schneider and Daniele Di Mitri and Joshua Weidlich and Marc Rittberger and Hendrik Drachsler},
  title     = {Are we there yet? - A systematic literature review on chatbots in education},
  journal   = {Frontiers in artificial intelligence},
  volume    = {4},
  number    = {art. 654924},
  pages     = {1 -- 18},
  doi       = {10.3389/frai.2021.654924},
  year      = {2021},
}