Échelles de base et mutations en syntaxe
Mitsou Ronat · HAL (Le Centre pour la Communication Scientifique Directe) · 1974
For each grammatical category, the language has a scale comprising a number of distinct classes. The use of the notions of scale and steps is justified by the fact that lexical items are determined by precise syntactic properties different from the classes, and by the fact that these properties increase in number with the "hierarchical degree" of the item.