A. Аndreev and  Yu. Rozhdestvenskii and  К. Platonov and  R. Salomaa,  Laser Excited Nuclear γ -Source of High Spectral Brightness.   journal   = {International Journal of Nuclear and Quantum Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2010, vol. 37(1). 7 - 13
    [viewed 16 October 2019]. Available from: https://publications.waset.org/pdf/13534.