Near-threshold photoproduction of in two-gluon exchange modelFancong Zeng, Xiao-Yun Wang, Li Zhang, Ya-Ping Xie, Rong Wang and Xurong ChenEur. Phys. J. C, 80 11 (2020) 1027DOI: https://doi.org/10.1140/epjc/s10052-020-08584-6