Quantization and soliton-like solutions for the -model in an optic fiber Francesco Belgiorno, Sergio L. Cacciatori, Simone Trevisan and Adriano Viganò Eur. Phys. J. C, 81 4 (2021) 294 Published online: 08 April 2021 DOI: 10.1140/epjc/s10052-021-09084-x