Analytical study of Thirring optical solitons with parabolic law nonlinearity and spatio-temporal dispersionQin Zhou, Lan Liu, Huijuan Zhang, Chun Wei, Jun Lu, Hua Yu and Anjan BiswasEur. Phys. J. Plus, 130 7 (2015) 138DOI: https://doi.org/10.1140/epjp/i2015-15138-9