VOSTEEN, Markus. Unter die Räder gekommen: Untersuchungen zu Sherratts "Secondary Products Revolution". Heidelberg: Propylaeum,2016. DOI: 10.11588/propylaeum.21.14. Disponível em: https://books.ub.uni-heidelberg.de/propylaeum/catalog/book/21.. Acesso em: 3 mai. 2024.