In Italy Reye's hypothesis is taught at applied mechanics courses, typically at the second or third year of the university. Some books with a discussion of Reye's hypothesis are 1) Panetti, M., Meccanica Applicata, Torino, 1947 2) Ettore Funaioli. Corso di meccanica applicata alle macchine Vol. I. Patron, Bologna, 3rd edition, 1973. There is also a quite short Italian Wikipedia page on the Reye hypothesis.