1. Lévy-Leblond, J.M.: J. Math. Phys.7, 2217 (1966)
2. Kramer, P., Moshinsky, M.: Group Theory of Harmonic Oscillators and Nuclear Structure. In “Group Theory and its Applications” (E.M. Loebl, ed.), pp. 340–468. New York and London: Academic Press 1968
3. Moshinsky, M.: Group Theory of the Few-Nucleon-Problem. In “Cargèse Lectures in Physics, Vol. 3” (M. Jean, ed.), pp. 251–329. New York, London, Paris: Gordon and Breach 1969
4. Kretzschmar, M.: Z. Physik157, 443 (1960)
5. Hamermesh, M.: Group Theory and its Application to Physical Problems, 2nd ed., pp. 214–231. Reading, Massachusetts, Palo Alto, London: Addison-Wesley 1964