BattyM, 2011, “Commentary. When all the world's a city”Environment and Planning A43765–772
2.
CristelliMBattyMPietroneroL, 2012, “There is more than a power law in Zipf”Scientific Reports 6 November, http://www.nature.com/srep/
3.
GerlandP, 2014, “World population stabilization unlikely this century”Science346(6206) 234–237
4.
JeffersonM, 1939, “The law of the primate city”The Geographical Review29226–232
5.
PisarenkoV FSornetteD, 2012, “Robust statistical tests of dragon-kings beyond power law distributions”European Physical Journal Special Topics20595–115