In some cases, however, there is identity in phonemic feature (partial assimilation) or in phonemes (repetition or total assimilation); e.g. /-s/ ‘plural’ occurs only after alternants ending in voiceless phonemes and is identically voiceless with the phoneme preceding it, while the voiced alternant /-z/ occurs only after voiced phonemes. Identity in whole phonemes is rarer: the consonant of the Greek reduplication, and the 'X' of the Kota 'iX'.
- Harris (1942a), a pag.177