Manrubia, Susanna C. Physical Chemistry, Fritz Haber Institute, Max Planck Society;
Solé, R. V., Manrubia, S. C., Pérez-Mercader, J., Benton, M., & Bak, P. (1998). Long-Range Correlations in the Fossil Record and the Fractal Nature of Macroevolution. Advances in complex systems, 1, 255-266. doi:10.1142/S021952599800017X.