Like so many theoretical ideas, the field of “neo-Riemannian theory” has its origins in David Lewin’s transformation theory. (Ironically, perhaps more than in Riemann’s own theory.) Richard Cohn is the most important figure here, and his writings on this topic alone could easily form the basis for an entire seminar.
Richard Cohn, “Neo-Riemannian Operations, Parsimonious Trichords, and Their Tonnetz Representations,” Journal of Music Theory 41/1 (1997): 1–66.
Steven Rings, “Riemannian Analytical Values, Paleo- and Neo-,” in The Oxford Handbook of Neo-Riemannian Music Theories, ed. Edward Gollin and Alexander Rehding (New York: Oxford University Press, 2011), 487–511.
Richard Cohn, Audacious Euphony: Chromaticism and the Triad’s Second Nature (New York: Oxford University Press, 2012), 17–81.