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Käufl, H. U., Rothermal, H., & Drapatz, S. (1984). Investigation of the Martian atmosphere by 10 micron heterodyne spectroscopy. A&A, 136, 319–325.
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Kaeufl, H. U., Rothermel, H., & Drapatz, S. (1984). Indication for H2O in the upper atmosphere of Mars. A&A, 141, 430–432.
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Algie L. L., W. D. S. and L. F. (1984). Phase noise and AM noise measurements in the frequency domain. Academic Press., 11, 239–289.
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