참고문헌
- to appear in Italian J. Pure App. Math. v.10 Hv-groups on the set {e,a,b} S. C. Chung;B. M. Choi
- 8th Congress Math. Scandinaves Sur une generalisation de la notion de groupe S. F. Marty
- Proc. 4th Internat. Congress Algebraic Hyperstructures and Appl. (AHA) The fundamental relation in hyperrings. The general hyperfields T. Vougiouklis
- Hyperstructures and their representations
- Discrete Mathematics v.155 Hv-groups defined on the same set