[...] the morpheme-alternants are recognised as members of the same morpheme by the functions which they serve, and belong to language. - Bazel (2004), a pag.99
[...] there are variant expressions of the morpheme (the so-called morpheme-alternants) which may resemble the expressions of distinct morphemes in so far as they have no phonemes in common. - Bazel (2004), a pag.98