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 20 September 2024]. Available from: https://publications.waset.org/pdf/16852.