Identification and survey of a novel avian coronavirus in ducks. oleh Gui-Qian Chen, Qing-Ye Zhuang, Kai-Cheng Wang, Shuo Liu, Jian-Zhong Shao, Wen-Ming Jiang, Guang-Yu Hou, Jin-Ping Li, Jian-Min Yu, Yi-Ping Li, Ji-Ming Chen