@article{Kruk:2019,
  author  = "M. Kruk",
  title   = "Dynamicity of perceived willingness to communicate, motivation, boredom and anxiety in Second Life: the case of two advanced learners of English",
  journal = "Computer Assisted Language Learning",
  volume  = "2019",
  pages   = "1--27",
  year    = "2019",
}