H. Essmann and  N. du Preez,  An Innovation Capability Maturity Model – Development and Initial Application.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2009, vol. 29(5). 382 - 393
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/14032.