Lukashevich, S. A., and N. V. Maksimenko. “The Construction of Relativistically Invariant Equations of Motion and the Momentum Energy Tensor for Spin-1/2 Particles With Polarizabilities in an Electromagnetic Field”. Ukrainian Journal of Physics 64, no. 8 (September 18, 2019): 702. Accessed October 21, 2021. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019405.