Littérature
Evolution in Modern Thought
Harald Høffding, August Weismann, Célestin Bouglé, William Bateson, P. N. (Philip Napier) Waggett, C. Lloyd (Conwy Lloyd) Morgan, J. B. (John Bagnell) Bury, Gustav Schwalbe, J. Arthur Thomson, Ernst Heinrich Philipp August Haeckel
