Data Sources
1. Border Established. African Boundaries: A Legal and Diplomatic Encyclopaedia, 1979, https://books.google.co.ug/books?redir_esc=y&id=A8Du4k0udx4C&q=algeria+tunisia#v=snippet&q=algeria%20tunisia&f=false
2. Border length. The World Factbook, 2021, https://www.cia.gov/the-world-factbook/countries/algeria/
3. Populations. Office National des Statistiques de l'Algérie,2008,https://www.citypopulation.de/en/algeria/admin/
4.Capital city populations. Office National des Statistiques de l'Algérie,2008,https://www.citypopulation.de/en/algeria/admin/
5. Area covered.
-algeria, https://www.citypopulation.de/en/algeria/cities/,accessed 27 june2021
-Tunisia,https://www.citypopulation.de/en/tunisia/cities/