WASET
    D. Allison and  A. Didenko and  G. Miller,  Investigating Transformations in the Cartesian Plane Using Spreadsheets.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 73(1). 84 - 87
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/2053.