Commutators in BCI-algebras. - Ardavan Najafi; Arsham Borumand Saeid; Esfandiar Eslami (J. Intell. Fuzzy Syst., 2016)

New elements in Hilbert algebras. - Ardavan Najafi (TFSS, 2024)

Two new kinds of orthomodular lattices: Nilpotent and Engel orthomodular lattices. - Ardavan Najafi (Discret. Math. Algorithms Appl., 2025)