Gauge symmetry of the chiral Schwinger model from an improved gauge unfixing formalismGabriella V. Ambrósio, Cleber N. Costa, Paulo R. F. Alves, Everton M. C. Abreu, Jorge Ananias Neto and Ronaldo ThibesEPL, 142 1 (2023) 10002DOI: https://doi.org/10.1209/0295-5075/acc4e5