Studying the parameters of the extended σ-ω model for neutron star matter David Alvarez-Castillo, Alexander Ayriyan, Gergely Gábor Barnaföldi, Hovik Grigorian and Péter Pósfay Eur. Phys. J. Special Topics, 229 22-23 (2020) 3615-3628 Published online: 21 December 2020 DOI: 10.1140/epjst/e2020-000106-4