Book Frege, Gottlob; (1976)
Wissenschaftlicher Briefwechsel. Herausgegeben, bearbeitet, eingeleitet, und mit Anmerkungen versehen von Gabriel, Gottfried, Hans Hermes, Friedrich Kambartel, Christian Theil, Albert Veraart (/isis/citation/CBB000022377/)

Article Hill, Claire Ortiz; (1994)
Frege's attack on Husserl and Cantor (/isis/citation/CBB000043998/)

Article Shapiro, Stewart; (2003)
Prolegomenon to Any Future Neo-Logicist Set Theory: Abstraction and Indefinite Extensibility (/isis/citation/CBB000410717/)

Book Ricketts, Tom; Potter, Michael D.; (2010)
The Cambridge Companion to Frege (/isis/citation/CBB001211647/)

Article Centrone, Stefania; (2010)
Functions in Frege, Bolzano and Husserl (/isis/citation/CBB001210980/)

Book Frege, Gottlob; (1980)
Philosophical and mathematical correspondence. Edited by Gabriel, Gottfried [et al.]. Abridged from the German edition by Brian McGuinness and translated by Hans Kaal (/isis/citation/CBB000028503/)

Article Yourgrau, Palle; (1997)
What is Frege's relativity argument? (/isis/citation/CBB000072682/)

Book Schüler, Wolfgang; (1983)
Grundlegungen der Mathematik in transzendentaler Kritik: Frege und Hilbert (/isis/citation/CBB000007451/)

Book Schirn, Matthias; (1998)
The philosophy of mathematics today (/isis/citation/CBB000080084/)

Book Frege, Gottlob; (1999)
Zwei Schriften zur Arithmetik: Funktion und Begriff; Ueber die Zahlen des Herrn H. Schubert. Hrsg. von Kienzler, Wolfgang (/isis/citation/CBB000082256/)

Book Kenny, Anthony; (1995)
Frege (/isis/citation/CBB000068876/)

Article Belna, Jean-Pierre; (2006)
Objectivité et principe de dualité: Le paragraphe 26 des Fondements de l'arithmétique de Frege (/isis/citation/CBB000770988/)

Article Lavers, Gregory; (2013)
Frege, Carnap, and Explication: “Our Concern Here Is to Arrive at a Concept of Number Usable for the Purpose of Science” (/isis/citation/CBB001212885/)

Article Demopoulos, William; (1994)
Frege, Hilbert, and the conceptual structure of model theory (/isis/citation/CBB000049624/)

Thesis David E. Dunning; (2020)
Writing the Rules of Reason: Notations in Mathematical Logic, 1847–1937 (/isis/citation/CBB517005733/)

Article Raphaël Sandoz; (2016)
Beyond Quantities and Qualities: Frege and Jevons on Measurement (/isis/citation/CBB553318264/)

Chapter Hylton, Peter; (2010)
Frege and Russell (/isis/citation/CBB001211659/)

Article Hunter, David A.; (1996)
Definition in Frege's Foundations of arithmetic (/isis/citation/CBB000072012/)

Article Read, Stephen; (1997)
Completeness and categoricity: Frege, Gödel and model theory (/isis/citation/CBB000079013/)

Book Currie, Gregory; (1982)
Frege: An introduction to his philosophy (/isis/citation/CBB000020047/)