1. Bhat, M. R., ed. Proceedings of the IAEA Advisory Group Meeting on Basic and Applied Problems of Nuclear Level Densities. Brookhaven, N.Y.
2. An Attempt to Calculate the Number of Energy Levels of a Heavy Nucleus
3. Nuclear Physics B. Nuclear Dynamics, Theoretical
4. The terminology used here is that a state is one of the (2J+1) degenerate components of a level of spin J (for spherically symmetric systems)