Alessandro Pesatori, Michele Norgia, V. Calabrese, Gianluca Galzerano, Elio Bava, Cesare Svelto. Optical Frequency Standard by HI Doppler-Broadened Absorption and External-Cavity Laser Diode at 1.541 muhboxm. IEEE T. Instrumentation and Measurement, 57(8):1708-1712, 2008. [doi]
Abstract is missing.