13. Чумаков Н. М. 1992. Климатический парадокс позднего докембрия. Природа, № 4, с.34–41.
14. Williams D. M. et al: 1998. Low–latitude glaciation and rapid changes in the Earth's obliquity explained by obliquity–oblateness feedback. Nature 3 Dec 98, 396:453.
15. Knoll A. H., Carrol S. B. 1999. Early animal evolution: emerging views from comparative biology and geology. Science, vol. 284, No. 5423, p.2045–2220.
16. Fedonkin M. A. 1996. Cold water cradle of animal life. Paleontological Journal, v.30, № 6, p.669–673.