M. Mika and  L. Pina and  M. Landova and  L. Sveda and  R. Havlikova and  V. Marsikova and  R. Hudec and  A. Inneman,  Lightweight Mirrors for Space X-Ray Telescopes.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2011, vol. 58(10). 852 - 856
    [viewed 29 November 2020]. Available from: https://publications.waset.org/pdf/2176.