Niles Eldredge i Stephen Jay Gould, 1972. "Punctuated equilibria: an alternative to phyletic gradualism" a T.J.M. Schopf, ed., Models in Paleobiology. San Francisco: Freeman Cooper. pàg. 82–115. Reimprimit a N. Eldredge Time frames. Princeton: Princeton Univ. Press. 1985
de la Cruz F, Davies J «Horizontal gene transfer and the origin of species: lessons from bacteria». Trends Microbiol., 8, 3, 2000, pàg. 128–33. DOI: 10.1016/S0966-842X(00)01703-0. PMID: 10707066.
Poole A, Penny D «Evaluating hypotheses for the origin of eukaryotes». Bioessays, 29, 1, 2007, pàg. 74–84. DOI: 10.1002/bies.20516. PMID: 17187354.
Dyall S, Brown M, Johnson P «Ancient invasions: from endosymbionts to organelles». Science, 304, 5668, 2004, pàg. 253–7. DOI: 10.1126/science.1094884. PMID: 15073369.
Eloise Hart, Pages of Medieval Mideastern History. (Isma'ili, Yezidi, Sufi, The Brethren Of Purity, Ismaili Heritage Society)
jamesmiller.ca
Miller, James. «Daoism and Nature» (PDF). Royal Asiatic Society, 08-01-2008. Arxivat de l'original el 2008-12-16. [Consulta: 15 juliol 2008].
mala.bc.ca
Johnston, Ian. «Section Three: The Origins of Evolutionary Theory». ... And Still We Evolve: A Handbook on the History of Modern Science. Liberal Studies Department, Malaspina University College, 1999. [Consulta: 11 agost 2007].
de la Cruz F, Davies J «Horizontal gene transfer and the origin of species: lessons from bacteria». Trends Microbiol., 8, 3, 2000, pàg. 128–33. DOI: 10.1016/S0966-842X(00)01703-0. PMID: 10707066.
Poole A, Penny D «Evaluating hypotheses for the origin of eukaryotes». Bioessays, 29, 1, 2007, pàg. 74–84. DOI: 10.1002/bies.20516. PMID: 17187354.
Dyall S, Brown M, Johnson P «Ancient invasions: from endosymbionts to organelles». Science, 304, 5668, 2004, pàg. 253–7. DOI: 10.1126/science.1094884. PMID: 15073369.