1. Aristotle, Organon, Athens, published by Andronikos of Rhodos around 40 b.c.
2. _________ , Topics, Athens, published by Andronikos of Rhodos around 40 b.c.
3. Paul Bernays, Erwiderung auf die Note von Herrn Aloys Müller: Über Zahlen als Zeichen, Mathematische Annalen, vol. 90 (1923), 159–163.
4. Susanne Bobzien, Stoic logic, in The Cambridge Companion to the Stoics (Brad Inwood, ed.), Cambridge University Press, Cambridge, 2003, pp. 85–123.
5. Joseph M. Bocheński, A History of Formal Logic, 2nd ed., [translated and edited by Ivo Thomas], Chelsea Publishing Company, New York, 1970.