Humphreys P. What Simulations Can Do That Experiments Cannot, And Vice Versa. In: ALIFE. 2010. p. 888.

Humphreys P. Computer simulations. In: PSA: Proceedings of the biennial meeting of the philosophy of science association. Vols. 1990. Philosophy of Science Association; 1990. pp. 497–506.

Humphreys P. Quantitative probabilistic causality and structural scientific realism. In: PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association. Vols. 1984. Philosophy of Science Association; 1984. pp. 329–342.

Humphreys P. Aleatory explanations expanded. In: PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association. Vols. 1982. Philosophy of Science Association; 1982. pp. 208–223.

Humphreys P. Probabilistic causality and multiple causation. In: PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association. Vols. 1980. Philosophy of Science Association; 1980. pp. 25–37.

Humphreys P. Is" Physical Randomness" Just Indeterminism in Disguise?. In: PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association. Vols. 1978. Philosophy of Science Association; 1978. pp. 98–113.