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- Data Sources [state of 1 December 2015]
- States_1: https://www.destatis.de/DE/Publikationen/StatistischesJahrbuch/Wahlen.pdf?__blob=publicationFile.
- States_2: http://de.statista.com/statistik/daten/studie/1242/umfrage/bevoelkerungsdichte-in-deutschland-nach-bundeslaendern/.
- Counties: https://ergebnisse.zensus2011.de/#StaticContent:00,BEV_11_14,m,table.