“Natural Law, Parental Rights and Education Policy," American Journal of Jurisprudence (December 2014)
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"Natural Law" (co-authored with Robert George), International Encyclopedia of Social and Behavioral Sciences, Second Edition
"Personal Identity and Gender: A Revised Aristotelian Approach," in Gender Identities in a Globalized World, ed. Ana Marta Gonzalez and Victor Seidler, Humanity Books, 2008, p. 75-108