Eliot, Christopher (March 2007). "Method and metaphysics in Clements's and Gleason's ecological explanations". Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences. 38 (1): 85–109. doi:10.1016/j.shpsc.2006.12.006. PMID17324810.
Eliot, Christopher (March 2007). "Method and metaphysics in Clements's and Gleason's ecological explanations". Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences. 38 (1): 85–109. doi:10.1016/j.shpsc.2006.12.006. PMID17324810.