From the introduction: "Reduplication is a process that often seems to be associated with exceptions to the application of phonological rules. Either reduplicated forms are exempt from the application of a rule, as described by Munro and Benson (1973) for Luiseño, or else they are subject to the application of rules in environments where they wouldn't be expected to apply, as in certain Tagalog examples mentioned by Bloomfield (1933:222). In this paper I discuss a problem of the second type in Copala Trique."
Hollenbach, Barbara E.
"Reduplication and anomalous rule ordering in Copala Trique,"
Work Papers of the Summer Institute of Linguistics, University of North Dakota Session: Vol. 17, Article 8.
Available at: https://commons.und.edu/sil-work-papers/vol17/iss1/8