scientific article published on 21 December 2017
author: Pieter François, Patrick Savage, Alessandro Ceccarelli, Nikolay Kradin, Andrey Korotayev, Alessio Palmisano, David Baker, David Christian, Árni Daníel Júlíusson, Eva J Brandl, Peter Turchin, Cameron A. Petrie, Amy Bogaard, Johannes Preiser-Kapeller, Arkadiusz Marciniak, Joseph Manning, Gavin Mendel-Gleason