Boncompagni, A. “On Trying to Say What ‘goes Without saying’. Wittgenstein on Certainty and Ineffability”. Ricerche Di Pedagogia E Didattica. Journal of Theories and Research in Education, vol. 9, no. 1, Jan. 2014, pp. 51-68, doi:10.6092/issn.1970-2221/4291.