The following publications are possibly variants of this publication:
- A method to compute the number of regular reversible Rosenberg hypergroupMorteza Jafarpour, Irina Cristea, Ali Tavakoli. arscom, 128:309-329, 2016.
- Enumeration of Varlet and Comer HypergroupsH. Aghabozorgi, M. Jafarpour, B. Davvaz. combinatorics, 18(1), 2011. [doi]
- EL-HypergroupsMichal Novák, Stepán Krehlík, Irina Cristea. symmetry, 10(11):611, 2018. [doi]
- On dihedral hypergroupsMorteza Jafarpour, Irina Cristea, F. Alizadeh. ejc, 44:242-249, 2015. [doi]