Precision study of production including Z-boson leptonic decays at the ILC Yu Zhang, Peng-Fei Duan, Wen-Gan Ma, Ren-You Zhang and Chong Chen Eur. Phys. J. C, 76 2 (2016) 76 Published online: 16 February 2016 DOI: 10.1140/epjc/s10052-016-3919-x