Hidehiko Okada and Takayuki Akiba, Evaluation of Fitts’ Law Index of Difficulty Formulation for Screen Size Variations. journal = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology. February 2014, vol. 85(1). 208 - 213 [viewed 22 September 2024]. Available from: https://publications.waset.org/pdf/9997694.