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Bedau M, Humphreys P, others. Emergence: Contemporary readings in philosophy and science. MIT press Cambridge, MA; 2008.

Humphreys P. Epistemolog del Siglo XXI. Anthropos 214. 2007.

Humphreys P. Kolmogorov, Andrei Nikolaevich. In: New Dictionary of Scientific Biography. New York: Charles Scribners and Sons; 2007. pp. 649–650.

Humphreys P, Speed T, Nolan D. Probability Theory and Its Models. In: Probability and Statistics: Essays in Honor of David A. Freedman. Institute of Mathematical Statistics Collections; 2007.

Fintel K, Borchert D. Encyclopedia of philosophy–second edition. 2006.

Salmon W. Four decades of scientific explanation. Pittsburgh: University of Pittsburgh press; 2006.

Humphreys P. Self-Assembling Systems. Philosophy of Science 73. 2006.

Humphreys P, Honderich T. The Oxford Companion to Philosophy (Second Edition). Oxford University Press. 2005.

Humphreys P. Teor{\’ıas de causación y explicación:?` necesariamente verdaderas o dominio-espec{\’ıficas?. Enrahonar: quaderns de filosofia. 2005;(37):019–33.