Ostrovska, O., and I. I. Yuryk. “Unitary Representations of Poincaré Group ${\mathrm{P}(1,n)}$ in ${\mathrm{SO}(1,n)}$-Basis”. Methods of Functional Analysis and Topology, vol. 27, no. 3, Sept. 2021, pp. 258-76, https://doi.org/https://doi.org/10.31392/MFAT-npu26_3.2021.06.