Quark matter and quark stars at finite temperature in Nambu–Jona-Lasinio model Peng-Cheng Chu, Xiao-Hua Li, Bin Wang, Yu-Min Dong, Yu-Yue Jia, Shu-Mei Wang and Hong-Yang Ma Eur. Phys. J. C, 77 8 (2017) 512 Published online: 02 August 2017 DOI: 10.1140/epjc/s10052-017-5092-2