Beata Czarnacka-Chrobot,  Effectiveness of Business Software Systems Development and Enhancement Projects versus Work Effort Estimation Methods.   journal   = {International Journal of Computer and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2013, vol. 81(9). 2595 - 2602
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/16852.