Bonatsos, D., Daskaloyannis, C., Drenska, S. B., Karoussos, N., Maruani, J., Minkov, N., Raychev, P. P., & Roussev, R. P. (2019). Staggering Effects in Nuclear and Molecular Spectra. HNPS Advances in Nuclear Physics, 10, 231–247. https://doi.org/10.12681/hnps.2193