The influence of user expertise and phone complexity on performance, ease of use and learnability of different mobile phones

@article{Ziefle2002TheIO,
  title={The influence of user expertise and phone complexity on performance, ease of use and learnability of different mobile phones},
  author={Martina Ziefle},
  journal={Behaviour & IT},
  year={2002},
  volume={21},
  pages={303-311}
}