Bonatsos, D., D. Lenis, D. Petrellis, P. Terziev, and I. Yigitoglu. “γ-Rigid Solution of the Bohr Hamiltonian Compared to the E(5) Critical Point Symmetry”. HNPS Advances in Nuclear Physics, vol. 14, Dec. 2019, pp. 71-76, doi:10.12681/hnps.2251.