Crawford, I. A. (). „Widening perspectives: The intellectual and social benefits of astrobiology (regardless of whether extraterrestrial life is discovered or not)”. International Journal of Astrobiology. 17 (1): 57–60. arXiv:1703.06239. Bibcode:2018IJAsB..17...57C. doi:10.1017/S1473550417000088.
Crawford, I. A. (). „Widening perspectives: The intellectual and social benefits of astrobiology (regardless of whether extraterrestrial life is discovered or not)”. International Journal of Astrobiology. 17 (1): 57–60. arXiv:1703.06239. Bibcode:2018IJAsB..17...57C. doi:10.1017/S1473550417000088.
Heisinger, H.; Head, J. (). „Topography and morphology of the Argyre basin, Mars: implications for its geologic and hydrologic history”. Planet. Space Sci. 50 (10–11): 939–981. Bibcode:2002P&SS...50..939H. doi:10.1016/S0032-0633(02)00054-5.
Crawford, I. A. (). „Widening perspectives: The intellectual and social benefits of astrobiology (regardless of whether extraterrestrial life is discovered or not)”. International Journal of Astrobiology. 17 (1): 57–60. arXiv:1703.06239. Bibcode:2018IJAsB..17...57C. doi:10.1017/S1473550417000088.
Heisinger, H.; Head, J. (). „Topography and morphology of the Argyre basin, Mars: implications for its geologic and hydrologic history”. Planet. Space Sci. 50 (10–11): 939–981. Bibcode:2002P&SS...50..939H. doi:10.1016/S0032-0633(02)00054-5.