F. Urem and K. Fertalj and I. Livaja, The Impact of Upgrades on ERP System Reliability. journal = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology. November 2011, vol. 59(11). 1492 - 1496 [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/14351.