1. Aerts, D., Apostel, L., De Moor, B., Hellemans, S., Maex, E., Van Belle, H., et al. (2007). World views: From fragmentation to integration. Internet Edition 2007. Originally published in 1994 by VUB Press: Brussels Internet edition by Clément Vidal and Alexander Riegler. http://www.vub.ac.be/CLEA/pub/books/worldviews.pdf .
2. Bearn, G. (1997). Waking to wonder: Wittgenstein’s existential investigations. Albany, NY: Stature University of New York Press.
3. Bowell, T. (2017). Wittgenstein on teaching and learning the rules: Taking him at his word. In M. A. Peters & J. Stickney (Eds.), A companion to Wittgenstein on education: Pedagogical investigations (pp. 643–658). Singapore: Springer.
4. Burbules, N. (2005). Learning and the limits of doubt. Response paper to Jeff Stickney. In K. Howe (Ed.), Philosophy of Education Society Yearbook (pp. 308–310). Paper given at the PES annual meeting, San Francisco.
5. Burbules, N. (2008). Tacit teaching. Educational Philosophy and Theory, 40(5), 666–677.