Commutative Doubly-Idempotent Semirings Determined by Chains and by Preorder Forests. - Natanael Alpay; Peter Jipsen (RAMiCS, 2020)

Unary-Determined Distributive ℓ-magmas and Bunched Implication Algebras. - Natanael Alpay; Peter Jipsen; Melissa Sugimoto (RAMiCS, 2021)

Varieties of unary-determined distributive $ ell$-magmas and bunched implication algebras. - Natanael Alpay; Peter Jipsen; Melissa Sugimoto (Log. Methods Comput. Sci., 2024)