Warby, C. A., J. D. Phillips, H. A. Bergonia, F. G. Whitby, C. P. Hill, and J. P. Kushner. “Structural and Kinetic Characterization of Mutant Human Uroporphyrinogen Decarboxylases”. Cellular and Molecular Biology, vol. 55, no. 2, July 2009, pp. 40-45, https://www.cellmolbiol.org/index.php/CMB/article/view/1086.