Trudeau, M.
, Chen, P.
, de, G.
, Hollberg, L.
and Tans, P.
(2006),
Stable isotopic analysis of atmospheric methane by infrared spectroscopy by use of diode laser difference-frequency generation, Applied Optics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50190
(Accessed April 25, 2025)