The islands of shape coexistence within the Elliott and the proxy-SU(3) Models Andriana Martinou, Dennis Bonatsos, T. J. Mertzimekis, K. E. Karakatsanis, I. E. Assimakis, S. K. Peroulis, S. Sarantopoulou and N. Minkov Eur. Phys. J. A, 57 3 (2021) 84 Published online: 02 March 2021 DOI: 10.1140/epja/s10050-021-00396-w