Geoffrey P. Barwood, Kelin Gao, Patrick Gill, Guilong Huang, Hugh A. Klein. Development of optical frequency standards based upon the :::2 :::S::1/2::-:::2:::D::5/2:: transition in :::88 :::Sr:::+::: and :::87:::Sr:::+:::. IEEE T. Instrumentation and Measurement, 50(2):543-547, 2001. [doi]
Abstract is missing.