Watts, Martin (1999). Working Oxen. Shire Album. 342. Princes Risborough, Buckinghamshire: Osprey Publishing. стр. 4. ISBN9780747804154. Приступљено 8. 2. 2016. „[...] tamed aurochs became the first domestic oxen. The earliest evidence for domestication is found in the Middle East around ten thousand years ago.”
Data on the barriers and motivators to more sustainable transport behaviour is available in the UK Department for Transport study "Climate Change and Transport ChoicesАрхивирано на сајту Wayback Machine (30. мај 2011)" published in December 2010.
Data on the barriers and motivators to more sustainable transport behaviour is available in the UK Department for Transport study "Climate Change and Transport ChoicesАрхивирано на сајту Wayback Machine (30. мај 2011)" published in December 2010.