Behn, R.Dupertuis, M.-A.Kjelberg, I.Krug, P.A.Salito, S.A.Siegrist, M.R.2008-04-182008-04-182008-04-181984https://infoscience.epfl.ch/handle/20.500.14299/22796LRP 249Buffer gases to increase the efficiency of an optically pumped far infrared D2Otext::report