Analysis of a one-dimensional Hamiltonian with a singular double well consisting of two nonlocal interactionsS. Fassari, M. Gadella, L. M. Nieto and F. RinaldiEur. Phys. J. Plus, 139 2 (2024) 132DOI: https://doi.org/10.1140/epjp/s13360-024-04923-8