Anisotropic but Nodeless Superconducting Gap in the Presence of Spin-Density Wave in Iron-Pnictide Superconductor NaFe_{1-x}Co_{x}As oleh Q. Q. Ge (葛青亲), Z. R. Ye (叶子荣), M. Xu (徐敏), Y. Zhang (张焱), J. Jiang (姜娟), B. P. Xie (谢斌平), Y. Song (宋宇), C. L. Zhang (张承林), Pengcheng Dai (戴鹏程), D. L. Feng (封东来)