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Kenklies, Karsten (12 February 2012). "Educational Theory as Topological Rhetoric: The Concepts of Pedagogy of Johann Friedrich Herbart and Friedrich Schleiermacher". Studies in Philosophy and Education. 31 (3): 265–273. doi:10.1007/s11217-012-9287-6. ISSN0039-3746. S2CID144605837.
Kenklies, Karsten (12 February 2012). "Educational Theory as Topological Rhetoric: The Concepts of Pedagogy of Johann Friedrich Herbart and Friedrich Schleiermacher". Studies in Philosophy and Education. 31 (3): 265–273. doi:10.1007/s11217-012-9287-6. ISSN0039-3746. S2CID144605837.