Interferometric frequency measurements of an iodine stabilized Nd: YAG laser. - Graham M. MacFarlane; Geoffrey P. Barwood; William R. C. Rowley; Patrick Gill (IEEE Trans. Instrum. Meas., 1999)

Development of optical frequency standards based upon the 2 S1/2-2D5/2 transition in 88 Sr+ and 87Sr+. - Geoffrey P. Barwood; Kelin Gao; Patrick Gill; Guilong Huang; Hugh A. Klein (IEEE Trans. Instrum. Meas., 2001)

Absolute frequency measurement of the R(12) 26-0 and R(106) 28-0 transitions in 127I2 at λ=543 nm. - Long Sheng Ma; Susanne Picard; Massimo Zucco; Jean-Marie Chartier; Lennart Robertsson; Petr Balling; Petr Krin; Jin Qian; Zhongyou Liu; Chunying Shi; Miguel Viliesid Alonso; Gan Xu; et al. (IEEE Trans. Instrum. Meas., 2006)

Observation of a Sub-10-Hz Linewidth 88Sr+ 2S1/2-2D5/2 Clock Transition at 674 nm. - Geoffrey P. Barwood; Patrick Gill; Guilong Huang; Hugh A. Klein (IEEE Trans. Instrum. Meas., 2007)