Roberts, M; Taylor, P; Gill, P (1999) Laser linewidth at the sub-Hertz level. NPL Report. CLM 8
Webster, S A; Taylor, P; Roberts, M; Barwood, G P; Gill, P (2002) Kilohertz resolution spectroscopy of the 2D1/2-2F7/2 electric octupole transition in a single 171Yb+ ion. Phys. Rev. A, At. Mol. Opt. Phys., 65 (5). 052501
Webster, S A; Taylor, P; Roberts, M; Barwood, G P; Gill, P (2002) Kilohertz resolution spectroscopy of the 2S1/2-1F7/2 electric octupole transition in a single 171Yb+ ion. Phys. Rev. A, At. Mol. Opt. Phys., 65 (5). 052501
Taylor, P; Webster, S A; Roberts, M; Rowley, W R C; Barwood, G P; Gill, P (2001) Progress towards a single ytterbium ion optical clock. Proc. SPIE - Int. Soc. Opt. Eng., 4269. pp. 155-169.
Roberts, M; Taylor, P; Barwood, G P; Rowley, W R C; Gill, P (2000) Observation of the 2S1/2-2F7/2 electric octupole transition in a single 171Yb+ ion. Phys. Rev. A, At. Mol. Opt. Phys., 62 (2). 020501(R)
Roberts, M; Taylor, P; Gateva-Kostova, S V*; Clarke, R B M*; Rowley, W R C; Gill, P (1999) Measurement of the 2S1/2-2D5/2 clock transition in a single 171Yb+ ion. Phys. Rev. A, At. Mol. Opt. Phys., 60 (4). pp. 2867-2872.
Taylor, P; Roberts, M; Macfarlane, G M; Barwood, G P; Rowley, W R C; Gill, P (1999) Measurement of the infrared 2F7/2-2D5/2 transition in a single 171Yb+ ion. Phys. Rev. A, At. Mol. Opt. Phys., 60 (4). pp. 2829-2833.
Taylor, P; Roberts, M; Barwood, G P; Gill, P (1998) Combined optical infrared single ion frequency standard. Opt. Lett., 23 (4). pp. 298-300.
Taylor, P; Roberts, M; Gateva-Kostova, S V*; Clarke, R B W*; Barwood, G P; Rowley, W R C; Gill, P (1997) Investigation of the 2S1/2-2D5/2 clock transition in a single ytterbium ion. Phys. Rev. A, 56. p. 2699.
Roberts, M; Taylor, P; Barwood, G P; Gill, P; Klein, H A; Rowley, W R C (1997) Observation of an electric octupole transition in a single Ion. Phys. Rev. Lett., 78 (10). pp. 1876-1879.
Webster, S A; Taylor, P; Roberts, M; Barwood, G P; Blythe, P; Gill, P (2002) A frequency standard using the 2S1/2 - 2F5/2 octupole transition in 171Yb+. In: Proceedings of the 6th Symposium on Frequency Standards and Metrology, 9-14 September 2001, University of St Andrews, Fife, Scotland, UK.
Roberts, M; Taylor, P; Gill, P (1999) Single ion spectroscopy of ytterbium. In: 13th EFTF/ 1999 IEEE FCS Conference Proceedings, 1999.
Taylor, P; Roberts, M; Barwood, G P; Gill, P (1998) Combined optical-infrared single ion frequency standard. In: Proc. 1998 CPEM Digest, July 1998, Washington, DC, USA.
Taylor, P; Roberts, M; Barwood, G P; Gill, P (1998) Combined optical-infrared single ion-frequency standard. In: CPEM '98 Conference on Precision Electromagnetic Measurements Conference Digest, 6-10 July 2003, Washington DC, USA.
Gill, P; Klein, H A; Roberts, M; Rowley, W R C; Taylor, P (1996) Absolute measurement of the 2S1/2 - 2D5/2 411nm interval, and the search for the 2S1/2 - 2F7/2 467nm transition in laser-cooled trapped 172Yb+. In: Proc. Fifth symposium on Frequency Standards and Metrology, 1996, Singapore.
Gill, P; Klein, H A; Levick, A P; Roberts, M; Rowley, W R C; Taylor, P (1994) A search for the 2S1/2 (2 sps - 1/2sbs) - 2F7/2 (2 sps -7/2sbs) 467 nm transition in laser cooled 172Yb+. (172 & + sps). In: 14th International Conference Digest on Atomic Physics, 1994, Boulder, Colorado, USA.