Structure of Ca in a phenomenological shell model A. O. Macchiavelli, H. L. Crawford, R. M. Clark, P. Fallon, I. Y. Lee, C. M. Campbell, M. Cromaz, A. Frotscher, C. Porzio and E. Rice Eur. Phys. J. A, 58 8 (2022) 144 Published online: 08 August 2022 DOI: 10.1140/epja/s10050-022-00763-1