Mohammadzadeh E, Mohammadzadeh F. α-NILPOTENT GROUPS DERIVED FROM HYPERGROUPS WITH ξ∗-RELATION. IJPAM [Internet]. 2018 Feb. 28 [cited 2026 Oct. 7];39:97-106. Available from: https://journals.uniurb.it/index.php/ijpam/article/view/6951