References
- Prolegomena of Hypergroup(Second Edition) P. Corsini;Aviani(ed.)
- Italian Journal Pure and Applied Mathematics v.3 Generalized action of a hypergroup on a set A. Madanshekaf;A. Ashrafi
- Hyperstructures and Their Representations T. Vougiouklis
- Algebra Universalis v.29 Representations of hypergroup by generalized permutation T. Vougiouklis