@article{ASUO_2020_XXVIII_1_a5,
     author = {F. Arabpur and M. Jafarpour and M. Aminizadeh and S. Hoskova-Mayerova ~
							},
     title = {On geometric polygroups},
     journal = {Analele Universit\u{a}\c{t}ii "Ovidius" Constan\c{t}a Seria Matematic\u{a}},
     publisher = {mathdoc},
     volume = {XXVIII},
     number = {1},
     year = {2020},
     url = {http://geodesic.mathdoc.fr/item/ASUO_2020_XXVIII_1_a5/}
}