1. The Variation of Animals and Plants Under Domestication;Darwin,1868
2. Das Domestikationssyndrom;Hammer;Kulturpflanze,1984
3. The social functions of botanical gardens in the society of the future;Faegri;Bot. Jahrb. Syst. Pflanzengesch. Pflanzengeogr.,1981
4. Quantitative analysis of culture using millions of digitized books;Michel;Science,2011
5. A History of Domesticated Animals;Zeuner,1963