Chih-Chun Lai and  Jun-Yu Wang,  The Size Effects of Keyboards (Keycaps) on Computer Typing Tasks.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2014, vol. 91(7). 1171 - 1173
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/9998816.