Wigner solution of the quark gap equation Zhu-Fang Cui, Shu-Sheng Xu, Bo-Lin Li, An Sun, Jing-Bo Zhang and Hong-Shi Zong Eur. Phys. J. C, 78 9 (2018) 770 Published online: 25 September 2018 DOI: 10.1140/epjc/s10052-018-6264-4