1. Harlan JR. Crops and Man. American Journal of Alternative Agriculture 1992;8(1):47−48.
2. Bowles S. Cultivation of cereals by the first farmers was not more productive than foraging. Proc Natl Acad Sci. USA; 2011;108(12):4760−4765.
3. Hunter-Gatherers Have Less Famine than Agriculturalists;Berbesque;Biol Lett,2014
4. Smith VL. Humankind in Prehistory: Economy, Ecology and Institutions. In: Anderson TL and Simmons RT, editors. The Political Economy of Customs and Culture, Rowman & Littlefield Publishers, USA; 1993;157−184.
5. Svizzero S, Tisdell C. Theories about the Commencement of Agriculture in Prehistoric Societies: A Critical Evaluation. Rivista di Storia Economica. 2014;3:255−280.