Cochran, E. L.; Adrian, F. J.; Bowers, V. A. (1964). "ESR Study of Ethynyl and Vinyl Free Radicals". Journal of Chemical Physics. 40 (1): 213. Bibcode:1964JChPh..40..213C. doi:10.1063/1.1724865.
Tucker, K. D.; Kutner, M. L.; Thaddeus, P. (1974). "The Ethynyl Radical C2H – A New Interstellar Molecule". Astrophysical Journal. 193: L115–L119. Bibcode:1974ApJ...193L.115T. doi:10.1086/181646.
Tucker, K. D.; Kutner, M. L. (1978). "The Abundance and Distribution of Interstellar C2H". Astrophysical Journal. 222: 859. Bibcode:1978ApJ...222..859T. doi:10.1086/156204.
Saleck, A. H.; Simon, R.; Winnewisser, G.; Wouterloot, J. G. A. (1994). "Detection of interstellar 13C12CH and 12C13CH". Canadian Journal of Physics. 72: 747. Bibcode:1994CaJPh..72..747S. doi:10.1139/p94-098.
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Cochran, E. L.; Adrian, F. J.; Bowers, V. A. (1964). "ESR Study of Ethynyl and Vinyl Free Radicals". Journal of Chemical Physics. 40 (1): 213. Bibcode:1964JChPh..40..213C. doi:10.1063/1.1724865.
Tucker, K. D.; Kutner, M. L.; Thaddeus, P. (1974). "The Ethynyl Radical C2H – A New Interstellar Molecule". Astrophysical Journal. 193: L115–L119. Bibcode:1974ApJ...193L.115T. doi:10.1086/181646.
Huggins, P. J.; Carlson, W. J.; Kinney, A. L. (1984). "The distribution and abundance of interstellar C2H". Astronomy & Astrophysics. 133: 347–356. Bibcode:1984A&A...133..347H.
Bel, N.; Leroy, B. (1998). "Zeeman splitting in interstellar molecules. II. The ethynyl radical". Astronomy & Astrophysics. 335: 1025–1028. Bibcode:1998A&A...335.1025B.
Müller, H. S. P.; Klaus, T.; Winnewisser, G. (2000). "Submillimeter-wave spectrum of the ethynyl radical, CCH, up to 1 THz". Astronomy & Astrophysics. 357: L65. Bibcode:2000A&A...357L..65M.
Tucker, K. D.; Kutner, M. L. (1978). "The Abundance and Distribution of Interstellar C2H". Astrophysical Journal. 222: 859. Bibcode:1978ApJ...222..859T. doi:10.1086/156204.
Combes, F.; Boulanger, F.; Encrenaz, P. J.; Gerin, M.; Bogey, M.; Demuynck, C.; Destombes, J. L. (1985). "Detection of interstellar CCD". Astronomy & Astrophysics. 147: L25. Bibcode:1985A&A...147L..25C.
Saleck, A. H.; Simon, R.; Winnewisser, G.; Wouterloot, J. G. A. (1994). "Detection of interstellar 13C12CH and 12C13CH". Canadian Journal of Physics. 72: 747. Bibcode:1994CaJPh..72..747S. doi:10.1139/p94-098.