On the opening pages of a Springer Reference, Handbook of the Mathematics of the Arts and Sciences, we find a list of 107 fascinating titles -- including two that link mathematics and poetry:
"Mathematics and Poetry -- Arts of the Heart" by Gizem Karaali and Lawrence M. Lesser
"Poems Structured by Mathematics" by Daniel May
Even for those of us who lack access to the Springer volume, the abstracts found at the links above offer lots of valuable references -- and contact information for the authors.
AND, if you are on Twitter, you can enjoy palindromes and other constrained verse by Anthony Etherin ( @Anthony_Etherin ) -- an author whose latest book has the title SLATE PETALS.