WASET
    M. R. Martinez-Torres and  S. L. Toral and  M. Olmedilla,  A Quantitative Study of the Evolution of Open Source Software Communities.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2015, vol. 102(6). 1367 - 1372
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/10001230.