Dillman, C. B., and E. J. Hilton. “The Cause and Effect of Polarization: Thoughts on the ‘Morphological Vs. Molecular Debate’ in Systematics, With Examples from the Study of Sturgeons (Actinopterygii: Acipenseridae)”. Zootaxa, vol. 2946, no. 1, July 2011, pp. 79–117, doi:10.11646/zootaxa.2946.1.16.