Biuniqueness is an axiom explicitly assumed within the framework of Natural Morphology which entails that every morpheme has one phonological form and one meaning, and every meaning (or grammatical category) corresponds to exactly one phonological form.
- Dressler, W. 1985b. Morphonology. Ann Arbor: Karoma.
- Dressler, W. 1985a. On the Predictiveness of Natural Morphology. Journal of Linguistics 21, 321-338.