1. Fronsdal, C.: Massless particles, orthosymplectic symmetry and another type of Kaluza-Klein theory. In: C. Fronsdal (ed.) Essays on Supersymmetry. Mathematical Physics Studies, vol. 8, p. 163. D. Reidel Pub. Co. (1986)
2. Bandos, I., Lukierski, J., Preitschopf, C., Sorokin, D.P.: Phys. Rev. D61, 065009 (2000)
3. Bandos, I., Azcárraga, J.A., Izquierdo, J.M., Lukierski, J.: Phys. Rev. Lett. 86, 4451–4454 (2001)
4. Lukierski, J., Toppan, F.: Phys. Lett. B539, 266 (2002)
5. Vasiliev, M.A.: Phys. Rev. D66, 066006 (2002)