Progress toward an optical frequency chain at NPL. - Stephen N. Lea; Graham M. MacFarlane; Guilong Huang; Patrick Gill (IEEE Trans. Instrum. Meas., 1999)

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)