Structural modifications of two-electron systems under isotropic harmonic confinementAshoke Hazra, Santanu Mondal, Sukhamoy Bhattacharyya, Jayanta K. Saha and K. D. SenEur. Phys. J. D, 75 6 (2021) 186DOI: https://doi.org/10.1140/epjd/s10053-021-00196-3