Time-covariant Schrödinger equation and invariant decay probability: the -Kantowski–Sachs universeTheodoros Pailas, Nikolaos Dimakis, Petros A. Terzis and Theodosios ChristodoulakisEur. Phys. J. C, 81 12 (2021) 1051DOI: https://doi.org/10.1140/epjc/s10052-021-09866-3