Bonatsos, D.; Daskaloyannis, C.; Drenska, S. B.; Karoussos, N.; Maruani, J.; Minkov, N.; Raychev, P. P.; Roussev, R. P. Staggering Effects in Nuclear and Molecular Spectra. HNPS Adv Nucl Phys 2019, 10, 231-247.