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  1. Olaf Tollefsen (1987). Crosby on the Origin of the Prescriptive Force of Moral Obligations. New Scholasticism 61 (4):462-476.
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  2. Olaf Tollefsen (1987). Practical Solipsism and “Thin” Theories of Human Goods. Proceedings of the American Catholic Philosophical Association 61:191-198.
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  3. Olaf Tollefsen (1985). The Challenge of Scepticism. Proceedings of the American Catholic Philosophical Association 59:81-90.
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  4. Olaf Tollefsen (1982). Realism, Conventionalism, and the History of Science. New Scholasticism 56 (3):292-305.
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  5. Olaf Tollefsen (1979). C. S. Lewis on Evaluative Judgments of Literature. The Modern Schoolman 56 (4):356-363.
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  6. Olaf Tollefsen (1979). Kovach's “Subjective” Definition of Beauty. New Scholasticism 53 (1):128-135.
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  7. Olaf Tollefsen (1976). The Family Resemblances Argument and Definitions of Art. Metaphilosophy 7 (3-4):206-216.
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  8. Germain Grisez, Olaf Tollefsen & Joseph M. Boyle (1972). Determinism, Freedom, and Self-Referential Arguments. Review of Metaphysics 26 (1):3-37.
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  9. Joseph M. Boyle Jr, Germain Grisez & Olaf Tollefsen (1972). Determinism, Freedom, and Self-Referential Arguments. Review of Metaphysics 26 (1):3 - 37.
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