Vervier, J. (1984). Deviations From the Center-of-gravity Theorem, the Monopole Boson Fermion Interaction and the Nuclear Supersymmetry. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 149(4-5), 267-271. https://doi.org/10.1016/0370-2693(84)90403-9 (Original work published 1984)