
Fuente: Wallace, A.R.(1858) On the tendency of varieties to depart indefinitely from the original type. J. Proc. Linnean Society (Zoology) 3:53–62.
Fuente: Wallace, A.R.(1858) On the tendency of varieties to depart indefinitely from the original type. J. Proc. Linnean Society (Zoology) 3:53–62.
Fuente: The Correspondence of Charles Darwin, Vol. 4. (1847-50)
Fuente: [Wiesel and Turturro Discuss Real World Horror as Art, http://legacy.fordham.edu/campus_resources/enewsroom/topstories_2577.asp, Tom, Stoelker, Fordham University, 6 de merzo de 2016]