Swann, W.
and Gilbert, S.
(2001),
Wavelength Calibration Standards for the WDM L-Band, Tech. Dig., Optical Fibre Measurement Conf. (OFMC), Cambridge, 1, UK, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=14297
(Accessed February 18, 2025)