1. E. Durkheim, Les règles de la méthode sociologique. Félix Alcan, Paris, Translated into English under the title: The rules of sociological method, 1895, [The French and English versions are freely available on Internet].
2. The Physics of Foraging. an Introduction To RandOm Searches and Biological Encounters;Viswanathan,2011
3. The complete title has the following pinyin transcription: Ren kou tong ji zi liao hui bian. zhong hua ren min gong he guo. [population statistics data compilation, 1949-1985. people’s Republic of China.]. published in 1988;Ren kou,1988
4. Article Mariage in the Dictionnaire Encyclopédique des Sciences Médicales, [Encyclopedic Dictionary of the Medical Sciences];Bertillon,1872
5. Des sociétés animales [on animal societies];Espinas,1878