Tolong jelaskan mengenai Sommers, Fred dari Logika leksikal

1970: "The Calculus of Terms," Mind 79: 1-39. Reprinted in Englebretsen, G., ed., 1987. The new syllogistic New York: Peter Lang.

1982: The logic of natural language. Oxford University Press.

1990: "Predication in the Logic of Terms," Notre Dame Journal of Formal Logic 31: 106-26.

and Englebretsen, George, 2000: An invitation to formal reasoning. The logic of terms. Aldershot UK: Ashgate. .

Szabolcsi Lorne, 2008. Numerical Term Logic. Lewiston: Edwin Mellen Press.

Interactive Syllogistic Machine for Term Logic A web based syllogistic machine for exploring fallacies, figures, terms, and modes of syllogisms.