[...] "back-copying", in which phonology that is derived in the reduplicant is replicated in the base [...]. - McCarthy & Prince (2004), a pag.390
[...] overapplication from R to B (back-copying), where R is the target of the basic phonology, requires otherwise unnecessary violation of I-O Faithfulnes to obtain optimal B [...]. - McCarthy & Prince (2004), a pag.418