Nonlinear chiral forms in the Sen formulation Sujiphat Janaun, Anajak Phonchantuek and Pichet Vanichchapongjaroen Eur. Phys. J. C, 84 8 (2024) 832 Published online: 20 August 2024 DOI: 10.1140/epjc/s10052-024-13207-5