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B. Mondin, "Philosophical Anthropology. Man: an Impossible Project?", Rome: Urbaniana University Press, 1991.
E. Voegelin, "The History of the race idea.From Ray to Carus", Louisiana State University Press 1998.
J. de Mul, "Plessner's Philosophical Anthropology. Perspectives and Projects", Amsterdam University Press 2014.
N. Sesardic, "Race: a social destruction of a biological concept", Biology and Philosophy (2010), pp. 143–162.