Roberts, Kari M.; Head, James W. (1990). «Lakshmi Planum, Venus: Characteristics and models of origin». Earth, Moon, and Planets. 50–51: 193-249. Bibcode:1990EM&P...50..193R. doi:10.1007/BF00142395.
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Roberts, Kari M.; Head, James W. (1990). «Lakshmi Planum, Venus: Characteristics and models of origin». Earth, Moon, and Planets. 50–51: 193-249. Bibcode:1990EM&P...50..193R. doi:10.1007/BF00142395.