WASET
    Yeliz Ekinci and  Raife Merve Ön,  A Review on the Comparison of EU Countries Based on Research and Development Efficiencies.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2015, vol. 103(7). 2437 - 2440
    [viewed 04 May 2024]. Available from: https://publications.waset.org/pdf/10002087.