{{Cite journal| doi = 10.3138/ttr.39.1.179| issn = 0730-479X| volume = 39| issue = 1| pages = 179–197| last1 = Forsé| first1 = Michel| last2 = Tronca| first2 = Luigi| title = The French and the Italians in relation to the difference principle| journal = The Tocqueville Review / La Revue Tocqueville| date = 2018}}