Quantum system ascribed to the Oppenheimer–Snyder model of massive starsAndrzej Góźdź, Jan J. Ostrowski, Aleksandra Pȩdrak and Włodzimierz PiechockiEur. Phys. J. C, 84 1 (2024) 10DOI: https://doi.org/10.1140/epjc/s10052-023-12305-0