Ekman, P. and Friesen, W.V. (1971) “Constants across Cultures in the Face and Emotion”, Journal of Personality and Social Psychology17(2): 124—9.
2.
Falk, R. (1986) “What Is a Gene?”, Studies in the History and Philosophy of Science17: 133—73.
3.
Fogle, T. (2001) “The Dissolution of Protein Coding Genes in Molecular Biology”, in P. Beurton , R. Falk and H.-J. Rheinberger (eds) The Concept of the Gene in Development and Evolution, pp. 3—25. Cambridge: Cambridge University Press.
4.
Griffiths, P.E. (1997) What Emotions Really Are: The Problem of Psychological Categories. Chicago: University of Chicago Press.
5.
Griffiths, P.E. (2004a) “Emotions as Natural Kinds and Normative Kinds”, Philosophy of Science71(5): 901—11.
6.
Griffiths, P.E. (2004b) “Is Emotion a Natural Kind?”, in R.C. Solomon (ed.) Thinking about Emotion: Contemporary Philosophers on Emotion, pp. 233—49. Oxford and New York: Oxford University Press.
7.
Hacking, I. (1991a) “On Boyd”, Philosophical Studies61: 149—54.
8.
Hacking, I. (1991b) “A Tradition of Natural Kinds”, Philosophical Studies61: 109—26.
9.
Johannsen, W. (1909) Elemente der exakten Erblichkeitslehre. Jena: Gustav Fischer.
10.
Lorenz, K.Z. (1965) “Preface”, in C. Darwin, The Expression of the Emotions in Man and Animals. Chicago, IL: University of Chicago Press.
11.
Portin, P. (1993) “The Concept of the Gene: Short History and Present Status”, The Quarterly Review of Biology68(2): 173—223.
12.
Snyder, M. and Gerstein, M. (2003) “Defining Genes in the Genomics Era”, Science300(5617): 258—60.
13.
Whewell, W. (1971 [1860]) On the Philosophy of Discovery . New York: Burt Franklin.