WASET
    J. Zamastil and  V. Patkos,  The Self-Energy of an Ellectron Bound in a Coulomb Field.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2013, vol. 79(7). 1171 - 1173
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/16481.