@misc{lemmen_sociotechnological_revolutions_2005, 
author={Lemmen, C., Wirtz, K.},
title={Socio-technological revolutions and migration waves: re-examining early world history with a mathematical model},
year={2005},
howpublished = {conference lecture: Mainz (D);},
note = {Lemmen, C.; Wirtz, K.: Socio-technological revolutions and migration waves: re-examining early world history with a mathematical model. Die Neolithisierung Mitteleuropas - The Spread of the Neolithic to Central Europe, Internationale Tagung. Mainz (D), 2005.}}