Gottlob Frege

Collected papers on mathematics, logic, and philosophy

Ensayos de semántica y filosofía de la lógica

Foundations of Arithmetic: A Logico-Mathematical Enquiry into the Concept of Number

Foundations of Arithmetic: A Logico-Mathematical Enquiry into the Concept of Number

Grundlagen der Arithmetik

Kleine Schriften

Les Ecrits posthumes

Osnove aritmetike i drugi spisi

Zwei Schriften zur Arithmetik