==External links==*GeoWhen Database - Aalenian*Lower Jurassic timescale, at the website of the subcommission for stratigraphic information of the ICS*Stratigraphic chart of the Upper and Lower Jurassic, at the website of Norges Network of offshore records of geology and stratigraphy*Definition of Aalenian from Science Dictionary
* Геологический словарь* GeoWhen Database — Aalenian* Lower Jurassic timescale, at the website of the subcommission for stratigraphic information of the ICS* Stratigraphic chart of the Upper and Нижняя юра, на веб-сайте Norges Network of offshore records of geology and stratigraphy