Ricardo Merlo,  Determination of the Gain in Learning the Free-Fall Motion of Bodies by Applying the Resource of Previous Concepts.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2024, vol. 205(1). 20 - 24
    [viewed 28 April 2024]. Available from: https://publications.waset.org/pdf/10013473.