Geodesic
Description of order 3 hypergroups over group arising from dihedral group $D_9$
Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2013), pp. 28-33.

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In the present paper we describe, up to isomorphism, all order $3$ unitary hypergroups over group, arising from the dihedreal group $D_9$.
Keywords: unitary hypergroup over group, completely reduced, dihedral group. 
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Parvaneh Zolfaghary. Description of order 3 hypergroups over group arising from dihedral group $D_9$. Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2013), pp. 28-33. http://geodesic.mathdoc.fr/item/UZERU_2013_2_a4/

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