Lendering, Jona. «Lippe» (en anglès). Livius.org: articles on ancient history, 2004 (2015). Arxivat de l'original el 2013-07-27. [Consulta: 30 març 2015]. «After the campaigns of Drusus (between 15 and 9 BCE), the Lippe valley was more or less conquered - the Sugambrians who lived there had been deported - and archaeologists have found several Roman military settlements.»
tufts.edu
perseus.tufts.edu
Smith, William; Leonhard, Schmitz. «Aliso or Alisum». A: Dictionary of Greek and Roman Geography (en anglès). Londres: Walton and Maberly, 1854.
web.archive.org
Lendering, Jona. «Lippe» (en anglès). Livius.org: articles on ancient history, 2004 (2015). Arxivat de l'original el 2013-07-27. [Consulta: 30 març 2015]. «After the campaigns of Drusus (between 15 and 9 BCE), the Lippe valley was more or less conquered - the Sugambrians who lived there had been deported - and archaeologists have found several Roman military settlements.»
