«…240 миллиардов африканских слонов» (см. с. 20): W. B. Whitman et al., “Prokaryotes: The unseen majority,” Proceedings of the National Academy of Sciences 95 (1998): 6578–83; J. S. Lipp et al., “Signifi cant contribution of Archaea to extant biomass in marine subsurface sediments,” Nature 454 (2008): 991–94; M. L. Sogin et al., “Microbial diversity in the deep sea and the underexplored ‘rare biosphere,’ ” Proceedings of the National Academy of Sciences 103 (2006): 12115–20.