"Blast from the Past? A controversial new idea suggests that a big space rock exploded on or above North America at the end of the last ice age, " by Rex Dalton, Nature, vol. 447, no. 7142, pages 256—257 (17 May 2007). Available on-line at: http://www.geo.arizona.edu/~reiners/blackmat.pdfАрхивная копия от 1 декабря 2017 на Wayback Machine.
"Blast from the Past? A controversial new idea suggests that a big space rock exploded on or above North America at the end of the last ice age, " by Rex Dalton, Nature, vol. 447, no. 7142, pages 256—257 (17 May 2007). Available on-line at: http://www.geo.arizona.edu/~reiners/blackmat.pdfАрхивная копия от 1 декабря 2017 на Wayback Machine.