Enumeration of 3- and 4-hypergroups on sets with two elements. - M. B. Safari; Bijan Davvaz; Violeta Leoreanu Fotea (Eur. J. Comb., 2015)

Enumeration of n-hypergroups on sets with two elements. - M. B. Safari; Bijan Davvaz (Discret. Math. Algorithms Appl., 2022)