R.L. Martinez has published extensively on Dante, Petrarch, Boccaccio, Ariosto, and Machiavelli. He is the co-editor, with Robert Durling, of the Oxford University Press edition of Dante's Comedy, and, also with Durling, co-authored a book on Dante's lyrics (Time and the Crystal: Studies in Dante's Rime Petrose, University of California Press, 1990). He translated Italian plays and literary criticism. His current research focuses on Dante’s poetic valorization of early modern technologies. In addition to Dante and Trecento Studies, his research interests include Renaissance drama and cultural history.