https://forskning.ruc.dk/da/publications/review-of-stefan-deschauer-die-arithmetik-vorlesung-des-georg-joa/
Review of Stefan Deschauer, Die Arithmetik-Vorlesung des Georg Joachim Rheticus, Wittenberg 1536....
georg joachim rheticusreview ofstefandiearithmetik
https://mathshistory.st-andrews.ac.uk/Biographies/Rheticus/
Georg Joachim Rheticus (1514 - 1574) - Biography - MacTutor History of Mathematics
Georg Joachim Rheticus was an Austrian mathematician and astronomer who published the trigonometrical sections of Copernicus's De Revolutionibus.
georg joachim rheticushistory of mathematicsbiography