1. Adell, S. (1994). Double-consciousness/Double bind: theoretical issues in twentieth-century black literature. Urbana: University of Illinois Press.
2. Assmann, A. (1989). Jaspers’ Achsenzeit, oder Schwierigkeiten mit der Zentralperspektive der Geschichte. In D. Harth (Ed.), Karl Jaspers: Denken zwischen Wissenschaft, Politik und Philosophie. Stuttgart: Metzler.
3. Assmann, J. (2012). Cultural memory and the myth of the axial age. In R. N. Bellah & H. Joas (Eds.), The axial age and its consequences (pp. 366–407). Cambridge: Harvard University Press.
4. Barkin, K. D. (2000). “‘Berlin days,’ 1892–1894: W. E. B. Du Bois and German Political Economy.” Boundary 2, 27(3): 79–101.
5. Barkin, K. D. (2005). W. E. B. Du Bois’ love affair with imperial Germany. German Studies Review, 28(2), 285–302.