[…] in many languages there are features which extend over morphemes or over particolar types of morphological stretches. Thus in English almost every word spoken in isolation has precisely one loud stress.
- Harris (1951), a pag.88

[…] in the utterance of many languages we can find some feature which extends throughout the length of an utterance and is descriptively equivalent to a comparable feature extending over the lentgh of the others. 'Did he come?' 'May I enter?' 'He saw you?' all have equivalent tone sequences: rising on every stressed vowel and on every segment after the last stressed vowel. In contrast, 'I met him.' 'He’s here.' 'Just got in.' may all be represented as having in common another tone sequence, different from the preceding one.
- Harris (1951), a pag.45

If the various features all occur whenever the domain occurs (i.e. are automatic in respect to it), they are not phonemic but are included in the definition of the juncture or contour marker of that domain. If various grades of them occur in various occurrences of the constructions of that interval, then these grades contour differences are phonemic […].
- Harris (1951), a pag.345, n.42