Publications of Place that refer to Armstrong (1989). Universals: An opinionated introduction.

Place, U. T. (1996c). Dispositions as intentional states. In D. M. Armstrong, C. B. Martin, U. T. Place, & T. Crane (Ed.) Dispositions: A debate (Chapter 2, pp. 19-32). Routledge.
Abstract:
All three authors agree that 'This glass is brittle' entails 'If it were suitably struck, it would break'. They also agree that such a statement, if true, requires a state of affairs whose existence makes it true (its truthmaker). They disagree as to its nature. For Place, it is an intentional state which "points towards" a possibly-never-to-exist future and a counterfactual past. In accordance with the conceptualist theory of universals and the picture theory of meaning which he outlines, such states are construed as properties of particulars. They provide Hume's "invisible glue" which sticks cause to effect.
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Download: 1996c Chapter 2 Dispositions as Intentional States.pdf