Ali Shojaei-Fard,  Fixed Point Equations Related to Motion Integrals in Renormalization Hopf Algebra.   journal   = {International Journal of Nuclear and Quantum Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2009, vol. 35(11). 1047 - 1052
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/6710.