1. Bainbridge, A. E. andHeidt, L. E. (1966),Measurements of methane in the troposphere and lower stratosphere, Tellus,18, 221?114.
2. Kyle, T. G., Murcray, D. G., Murcray, F. H. andWilliams, W. J. (1969),Abundance of methane in the atmosphere above 20 kilometers, J. Geophys. Res.74, 3421?3425.
3. Ackerman, M., Frimout, D., Lippens, C. etMuller, C. (1972),Détermination de la distribution verticale du méthane stratosphérique par spectrométrie infrarouge en ballon, Bull. Acad. Roy. Belgique, Cl. Sc.55, 493?501.
4. Cumming, C. andLowe, R. P. (1973),Balloon-borne spectroscopic measurement of stratospheric methane, J. Geophys. Res.78, 5259?5264.
5. Burkert, P., Rabus, D. andBolle, H. J.,Stratospheric water vapor and methane profiles inProc. Int. Conf. on Struct., Compos, and Gen. Circ. of the Upper and Lower Atmos. and Poss. Anthrop. Pert., Vol. 1 (1974), pp. 267?274.