Effects of spin–orbit interactions, external fields and eccentricity on the optical absorption of an elliptical quantum ringVahid Ashrafi-Dalkhani, Sajad Ghajarpour-Nobandegani and Mohammad Javad KarimiEur. Phys. J. B, 92 1 (2019) 19DOI: https://doi.org/10.1140/epjb/e2018-90691-5