@article{UZERU_2013_2_a4,
     author = {Parvaneh Zolfaghary},
     title = {Description of order 3 hypergroups over group arising from dihedral group $D_9$},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {28--33},
     publisher = {mathdoc},
     number = {2},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2013_2_a4/}
}