1. V. G. Kadyshevskii, “A new approach to the theory of electromagnetic interactions,” Fiz. Élement. Chast. Atom. Yadr., 11, No. 1, 5–39 (1980).
2. G. M. Mubarakzyanov, “Classification of real structures of Lie algebras of order five,” Izv. Vyssh. Uchebn. Zaved., Ser. Mat., No. 3(34), 99–106 (1963).
3. G. M. Mubarakzyanov, “On solvable Lie algebras,” Izv. Vyssh. Uchebn. Zaved., Ser. Mat., No. 1(32), 114–123 (1963).
4. V. M. Fedorchuk, Continuous Subgroups of the Inhomogeneous de Sitter Group P(1, 4) [in Russian], Preprint No. 78.18, Institute of Mathematics, Ukrainian Academy of Sciences, Kiev (1978).
5. V. M. Fedorchuk, “Nonsplit subalgebras of the Lie algebra of the generalized Poincaré group P(1, 4),” Ukr. Math. J., 33, No. 5, 535–538 (1981).