Studying sub-saturation density symmetry energy with different nuclear thermometers Hui-Xiao Duan, Fan Zhang, Jun Su, Long Zhu and Chen-Chen Guo Eur. Phys. J. A, 59 4 (2023) 93 Published online: 29 April 2023 DOI: 10.1140/epja/s10050-023-01008-5