1. The indexical element in morphology;Anttila;Innsbrucker Beiträge zur Sprachwissenschaft,1975
2. The loss of the negative particle ne in French;Ashby;Language,1981
3. Structure des relations de personne dans le verbe;Benveniste,1966
4. The necessity of variable rules;Berdan,1975
5. Inherent variability and variable rules;Bickerton;Foundations of Language,1971