https://en.wikipedia.org/wiki/Black_Notebooks
https://www.theguardian.com/books/2014/mar/13/martin-heidegger-black-notebooks-reveal-nazi-ideology-antisemitism
https://www.chronicle.com/article/Release-of-Heidegger-s/144897/
Ingo Farin &
Jeff Malpas (2017). On Overestimating Philosophy:
Lessons from Heidegger’s Black Notebooks, Journal of Aesthetics
and Phenomenology, 4:2, 183-195
