Mathematical Foundations for a Compositional Distributional Model of Meaning by Bob Coecke, Mehrnoosh Sadrzadeh, Stephen Clark - [arXiv](https://arxiv.org/abs/1003.4394)

The n-category cafe contains a summary and discussion of it: [Linguistics Using Category Theory](https://golem.ph.utexas.edu/category/2018/02/linguistics_using_category_the.html)