with Shields, J. , 2018, 'Asymmetry in the unificationist theory of causal explanation', Synthese 195 (2), 765-783.
, 2011, 'Auxiliary hypotheses in evidence and evolution', Philosophy and Phenomenological Research 83 (3), 673-682.
, 2003a, 'Why evolution is really indeterministic', Synthese 136 (2), 263-279.