Sense and reference in Frege's logic - Thiel, Christian (Dordrecht D. Reidel, 1968)
Bibliography: p. 162-169.
Issued also as thesis, Universitat Erlangen-Nurnberg.
Translation of Sinn und Bedeutung in der Logik Gottlob Freges.
Keywords: Frege, Gottlob -- 1848-1925 -- Logic