O. Ostrovska and I. I. Yuryk, “Unitary representations of Poincaré group ${\mathrm{P}(1,n)}$ in ${\mathrm{SO}(1,n)}$-basis”, MFAT, vol. 27, no. 3, pp. 258–276, Sep. 2021, doi: https://doi.org/10.31392/MFAT-npu26_3.2021.06.