Nagl, Ludwig (Autor Personal)

Zur Kantforschung der Gegenwart, 1981 (a.e.) t.p. (Ludwig Nagl)

Charles Sanders Peirce, c1992: t.p. (Ludwig Nagl) ser. t.p. (b. 1944)

Filmphilosophie-Symposium mit Robert B. Pippin, 2016 ECIP data view (Nagl, Ludwig; birth date: 27.04.1944)

Wikipedia, viewed October 26, 2020 (Ludwig Nagl, born 1944 in Vöcklabruck, Austria; associate professor i. R. at the Institute for Philosophy at the University of Vienna) https://de.wikipedia.org/wiki/Ludwig_Nagl