DAVVAZ, BIJAN; VOUGIOUKLIS, SOUSANA; VOUGIOUKLIS, THOMAS. On the multiplicative Hv-rings derived from helix hyperoperations. Utilitas Mathematica , [S. l.], v. 84, 2011. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/816. Acesso em: 8 may. 2026.