Barker, Graeme. Prehistoric Farming in Europe. Cambridge: Cambridge University Press. 1985: 120. ISBN 0-521-22810-7. discussed "...mixed farming, mobile stock keeping, and dairying" (emphasis added) around 3500–2500 BCE
McDonnell, John. The Role of Transhumance in Northern England. Northern History. 1988, 24: 1–17. doi:10.1179/nhi.1988.24.1.1.
Andaluz Westreicher, Carlos; Mérega, Juan Luis; y Palmili, Gabriel. The Economics of Pastoralism: Study on Current Practices in South America. Nomadic Peoples. 2007, 11 (2): 87. doi:10.3167/np.2007.110205. pp. 87–105. (Print), 1752–2366 (Online).
de Abreu, Urbano Gomes Pinto; McManus, Concepta; y Santos, Sandra Aparecida. Cattle ranching, conservation and transhumance in the Brazilian Pantanal. Pastoralism. 2010, 1 (1). doi:10.3362/2041-7136.2010.007 (不活跃 2020-05-21). pp. 99–114. (print), 2041-7136 (online).