Biographischer Index der Astronomie = Biographical index of astronomy / Wilhelm Brüggenthies,
Wolfgang R. Dick, 2005
Information trouvée : dates de naissance et de mort, note biographique.
Tycho brahe's description of his instruments and scientific work / translate and ed.
by Hans Ræder, Elis Strömgren and Bengt Strömgren, 1946
https://lccn.loc.gov/no2019189637, 2022-06-27