www.astrobiology.com [online]. [cit. 21-05-2008]. Dostupné v archivu pořízeném dne 29-05-2012.
doi.org
Takai K, Nakamura K, Toki T, Tsunogai U, Miyazaki M, Miyazaki J, Hirayama H, Nakagawa S, Nunoura T, Horikoshi K. Cell proliferation at 122 °C and isotopically heavy CH4 production by a hyperthermophilic methanogen under high-pressure cultivation. Proc Natl Acad Sci USA. 2008, roč. 105, s. 10949–54. doi:10.1073/pnas.0712334105.