1. Bargelli, D. & Lambek, J. (2001). An algebraic approach to French sentence structure, In [dGMR2001] (pp. 62–78).
2. Bescherelle 1, (1998). L’art de conjuger, Éditions Hurtebise, Montréal.
3. Bescherelle 3, (1998). La grammaire pour tous, Éditions Hurtebise, Montréal.
4. Buszkowski, W. (2001). Lambek grammars based on pregroups. In [dGMR2001], 95–109.
5. Casadio, C., & Lambek, J. (2008). Computational algebraic approaches to natural language. Polimetrica, Milano.