[...] we saw that a rule which appeared to underapply internally in reduplicated forms was a cyclic rule [...].
- Marantz (2004), Pag. 345

Drawing on the work of Kiparsky [Kiparsky, P., 1973, “Phonological Representations”, in Fujimura, ed., “Three Dimensions of Linguistic Theory”, TEC, Tokyo], Mascarò [Mascarò, J., 1976, “Catalan Phonology and the Phonological Cycle”, Doctoral dissertation, MIT, Cambridge] and Halle [Halle, M., 1979, “Formal vs. Functional Considerations in Phonology”, Indiana University Linguistics Club, Bloomington, Indiana] identify as "cyclic" the class of rules which appear to apply only in derived environments.
- Marantz (2004), Pag. 342