C. B. Dillman 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, pp. 79–117, Jul. 2011.