Tolong jelaskan mengenai Bacaan tambahan dari Pythagoreanisme

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Jacob, Frank Die Pythagoreer: Wissenschaftliche Schule, religiöse Sekte oder politische Geheimgesellschaft?, in: Jacob, Frank (Hg.): Geheimgesellschaften: Kulturhistorische Sozialstudien/ Secret Societies: Comparative Studies in Culture, Society and History, Globalhistorische Komparativstudien Bd.1, Comparative Studies from a Global Perspective Vol. 1, Königshausen&Neumann, Würzburg 2013, S.17-34.

O'Meara, Dominic J. Pythagoras Revived: Mathematics and Philosophy in Late Antiquity , Clarendon Press, Oxford, 1989. ISBN 0-19-823913-0

Riedweg, Christoph Pythagoras: his life, teaching, and influence ; translated by Steven Rendall in collaboration with Christoph Riedweg and Andreas Schatzmann, Ithaca: Cornell University Press, (2005), ISBN 0-8014-4240-0