1. Absolute frequency of 87Sr at 1.8 × 10−16 uncertainty by reference to remote primary frequency standards. (15th February 2021) Authors: Nemitz, Nils; Gotoh, Tadahiro; Nakagawa, Fumimaru; Ito, Hiroyuki; Hanado, Yuko; Ido, Tetsuya; Hachisu, Hidekazu Journal: Metrologia Issue: Volume 58:Number 2(2021) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗