Hvidtfelt Nielsen, Karsten. “Frege – The Unintentional Linguist. On Frege’s Views of Language in the Context of 19th Century German Linguistics”. Tidsskrift for Sprogforskning 6, no. 1 (maj 1, 2008): 1–35. Set maj 3, 2024. https://tidsskrift.dk/tfs/article/view/1673.