DFB fiber lasers as optical wavelength standards in the 1.5-μm region. - Harald Simonsen; Jes Henningsen; Susanne Søgaard (IEEE Trans. Instrum. Meas., 2001)

Molecular transitions as medium-precision wavelength standards for optical communication. - Jes Henningsen; Jan C. Petersen (IEEE Trans. Instrum. Meas., 2005)

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)