G. H. Li and  M. Liu and  H. J. Qi and  Q. Zhu and  W. Z. He,  Experiment Study on the Influence of Tool Materials on the Drilling of Thick Stacked Plate of 2219 Aluminum Alloy.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2017, vol. 129(9). 645 - 650
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10007906.