The weak decay to Z(3930) and X(4160) by Bethe–Salpeter methodZhi-Hui Wang, Yi Zhang, Tianhong Wang, Yue Jiang and Guo-Li WangEur. Phys. J. C, 80 8 (2020) 791DOI: https://doi.org/10.1140/epjc/s10052-020-8372-1