Godun, R M; Baynham, C F A; Jones, J M; King, S A; Nisbet-Jones, P B R; Baynes, F; Rolland, A; Baird, P E G; Bongs, K; Gill, P; Petit, G; Margolis, H S (2018) Absolute frequency measurement of the ytterbium ion E3 optical clock transition using international atomic time. In: 2018 European Frequency and Time Forum (EFTF), 10-12 April 2018, Turin, Italy.

Baynham, C F A; Godun, R M; Jones, J M; King, S A; Nisbet-Jones, P B R; Baynes, F; Rolland, A; Baird, P E G; Bongs, K; Gill, P; Margolis, H S (2018) Absolute frequency measurement of the S-2(1/2) - F-2(7/2) optical clock transition in Yb-171(+) with an uncertainty of 4 x 10(-16) using a frequency link to international atomic time. Journal of Modern Optics, 65 (5-6). pp. 585-591. ISSN 0950-0340