1. Betti, E.: Teoria generale della interpretazione. Giuffrè, Milano (1955)
2. Burlea, A.S., Burdescu, D.D.: An integrative approach of e-learning: from consumer to prosumer. In: Uskov, V., Howlett, R., Jain, L. (eds.) Smart Education and e-Learning 2016. SIST, vol. 59, pp. 269–279. Springer, Cham (2016). https://doi.org/10.1007/978-3-319-39690-3_24
3. Buzan, T.: The Mind Map Book. Pengiun Books, New York (1994)
4. Horndike, E.L.: Educational measurements of fifty years ago. J. Educ. Psychol. (6), 551–552 (2013)
5. Rorty, R.: Objectivity, Relativism, and Truth: Philosophical Papers, vol. 1. Cambridge University Press, Cambridge (1991)