Tornisterschrift-des-Oberkommandos-der-Wehrmacht-Soldaten-Atlas. (archive.org [abgerufen am 14. Juni 2020]).
books.google.com
David H. James: The Rise and Fall of the Japanese Empire. Routledge, 2010, ISBN 978-1-136-92546-7 (englisch, google.com): “by 1942, this 'Empire' covered about 3,285,000 square miles”
Jaime E. Rodriguez, Jaime E. Rodríguez O, Kathryn Vincent: Myths, Misdeeds, and Misunderstandings: The Roots of Conflict in U.S.-Mexican Relations. Rowman & Littlefield, 1997, ISBN 978-0-8420-2662-8, S.47 (englisch, google.com [abgerufen am 14. Juni 2020]): “When it was founded in 1821, the Mexican Empire extended over 4,429,000 km2 (not including the 445,683 km2 temporarily added by the short-lived union of the Central American provinces).”
Mark Harrison: The Economics of World War II: Six Great Powers in International Comparison. Cambridge University Press, 2000, ISBN 978-0-521-78503-7, S.3 (google.com [abgerufen am 2. Oktober 2016]).
H. L Wesseling: The European Colonial Empires: 1815–1919. Routledge, 2015, ISBN 978-1-317-89507-7, S.93 (englisch, google.com): “Islam spread quickly in Hausaland, which, after the jihad of 1804, was incorporated into the Sokoto Caliphate, a vast empire of 400,000 square kilometres.”
britannica.com
Encyclopædia Britannica: Germany from 1871 to 1918. Abgerufen am 29. September 2016: „At its birth Germany occupied an area of 208,825 square miles (540,854 square km) and had a population of more than 41 million, which was to grow to 67 million by 1914.“
Rein Taagepera: Size and Duration of Empires: Growth-Decline Curves, 600 B.C. to 600 A.D. In: Social Science History. 3. Jahrgang, Nr.3/4, 1979, S.117, doi:10.2307/1170959.
Rein Taagepera: Size and Duration of Empires: Growth-Decline Curves, 600 B.C. to 600 A.D. In: Social Science History. 3. Jahrgang, Nr.3/4, 1979, S.121–122, 124–129, 132–133, doi:10.2307/1170959.
Jean-Noël Biraben: Essai sur l'évolution du nombre des hommes. In: Population (French Edition). Band34, Nr.1, 1979, S.13–25, doi:10.2307/1531855, JSTOR:1531855.
doria.fi
Ulf Sundberg: Swedish defensive fortress warfare in the Great Northern War 1702–1710. Hrsg.: Åbo Akademis förlag. Åbo 2018, ISBN 978-951-765-897-3, S.26 (doria.fi [PDF]): „In 1700, the Swedish Empire covered a land area of 990,000 square kilometers and had 2,500,000 inhabitants.“
Peter Fibiger Bang, C. A. Bayly, Walter Scheidel: The Oxford World History of Empire: Volume One: The Imperial Experience. Oxford University Press, 2020, ISBN 978-0-19-977311-4 (google.de [abgerufen am 17. April 2024]).
google.pt
books.google.pt
„Book: America and the Crisis of Global Power by the famous diplomat and political scientist Zbignew Brzezinski“ „Archived“
guinnessworldrecords.com
Largest empire by percentage of world population. In: Guinness World Records. (guinnessworldrecords.com [abgerufen am 26. Oktober 2018]).
Área Territorial Brasileira. In: www.ibge.gov.br.Brazilian Institute of Geography and Statistics, abgerufen am 16. Oktober 2016 (portugiesisch): „A primeira estimativa oficial para a extensão superficial do território brasileiro data de 1889. O valor de 8.337.218 km² foi obtido a partir de medições e cálculos efetuados sobre as folhas básicas da Carta do Império do Brasil, publicada em 1883. [The first official estimate of the surface area of the Brazilian territory dates from 1889. A value of 8,337,218 km² was obtained from measurements and calculations made on drafts of the Map of the Empire of Brazil, published in 1883.]“
jstor.org
Jean-Noël Biraben: Essai sur l'évolution du nombre des hommes. In: Population (French Edition). Band34, Nr.1, 1979, S.13–25, doi:10.2307/1531855, JSTOR:1531855.
Peter Turchin, Jonathan M. Adams, Thomas D. Hall: East-West Orientation of Historical Empires. In: Journal of world-systems research. 12. Jahrgang, Nr.2, Dezember 2006, ISSN1076-156X, S.222–223 (pitt.edu [abgerufen am 25. August 2016]).
Es gibt verschiedene Schätzungen für das Römische Reich. Siehe: Scheidel (2006, S. 2). Goldsmith (1984, S. 263) . Beloch (1886, S. 507). Maddison (2006, S. 51, 120) Roman Empire Population
Peter Turchin, Jonathan M. Adams, Thomas D. Hall: East-West Orientation of Historical Empires. In: Journal of world-systems research. 12. Jahrgang, Nr.2, Dezember 2006, ISSN1076-156X, S.222–223 (pitt.edu [abgerufen am 25. August 2016]).