Alla A. Mityureva,  Electron-Impact Excitation of Kr 5s, 5p Levels.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 1690 - 1693
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/8562.