@article{FPM_2013_18_6_a5,
     author = {S. H. Dalalyan and P. Zolfaghari},
     title = {The hypergroups of order~3 over a~group arising from the dihedral group of order~18},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {95--110},
     publisher = {mathdoc},
     volume = {18},
     number = {6},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2013_18_6_a5/}
}