Davis, Donald W. (January 23, 2008). "Sub-million-year age resolution of Precambrian igneous events by thermal extraction-thermal ionization mass spectrometer Pb dating of zircon: Application to crystallization of the Sudbury impact melt sheet". Geology. 36 (5): 383–386. Bibcode:2008Geo....36..383D. doi:10.1130/G24502A.1.
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Davis, Donald W. (January 23, 2008). "Sub-million-year age resolution of Precambrian igneous events by thermal extraction-thermal ionization mass spectrometer Pb dating of zircon: Application to crystallization of the Sudbury impact melt sheet". Geology. 36 (5): 383–386. Bibcode:2008Geo....36..383D. doi:10.1130/G24502A.1.
