Майкл Маршалл Хронология: эволюция живого (англ Michael Marshall Timeline: The Evolution of Life. New Scientist, July 14, 2009, www newscientist.com/article/dn17453-timeline-the-evolution-of-life, retrieved March 17, 2017; Timeline of the Evolution of Life, Wikipedia en wikipedia org/wiki/Timeline_of_the_evolutionary_history_of_life; March 17, 2017)
