Livio, M.; Hollowell, D.; Weiss, A.; Truran, J. W. (27 July 1989). "The anthropic significance of the existence of an excited state of 12C". Nature. 340 (6231): 281–284. Bibcode:1989Natur.340..281L. doi:10.1038/340281a0. S2CID4273737.
Livio, M.; Hollowell, D.; Weiss, A.; Truran, J. W. (27 July 1989). "The anthropic significance of the existence of an excited state of 12C". Nature. 340 (6231): 281–284. Bibcode:1989Natur.340..281L. doi:10.1038/340281a0. S2CID4273737.
Livio, M.; Hollowell, D.; Weiss, A.; Truran, J. W. (27 July 1989). "The anthropic significance of the existence of an excited state of 12C". Nature. 340 (6231): 281–284. Bibcode:1989Natur.340..281L. doi:10.1038/340281a0. S2CID4273737.