See pp.190, 195, 205 of François, Alexandre (2008), "Semantic maps and the typology of colexification: Intertwining polysemous networks across languages", in Vanhove, Martine (ed.), From Polysemy to Semantic change: Towards a Typology of Lexical Semantic Associations, Studies in Language Companion Series, vol. 106, Amsterdam, New York: Benjamins, pp. 163–215.
Philip J. van der Eijk, "The Heart, the Brain, the Blood and the pneuma: Hippocrates, Diocles and Aristotle on the Location of Cognitive Processes," in Medicine and Philosophy in Classical Antiquity: Doctors and Philosophers on Nature, Soul, Health and Disease (Cambridge University Press, 2005), pp. 131–132 et passim.ISBN0-521-81800-1
One or more of the preceding sentences incorporates text from a publication now in the public domain: Hicks, Robert Drew (1911). "Stoics". In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 25 (11th ed.). Cambridge University Press. pp. 942–951.