In-medium and isospin effects on eta production in heavy-ion collisions near threshold energies Jie Chen, Zhao-Qing Feng, Peng-Hui Chen, Fei Niu, Ya-Fei Guo and Jian-Song Wang Eur. Phys. J. A, 53 6 (2017) 128 Published online: 19 June 2017 DOI: 10.1140/epja/i2017-12325-3