Selected Discussions of the Logic of Common Nouns

Aldo Bressan -- On Gupta's book The Logic of Common Nouns, Journal of Philosophical Logic 22 (1993), 335-383. (link)

Gonzalo E. Reyes, et al. --A Topos-Theoretic Approach to Reference and Modality, Notre Dame Journal of Formal Logic 32 (1991), 359-391. (free access)

M. L. P. Reyes, G. E. Reyes -- A Boolean-Valued Version of Gupta's Semantics, Logicque et Analyse, 1989.

James McCawley -- Review of The Logic of Common Nouns, Journal of Philosophy 79 (1982), 512-517. (link)