@article{AUPO_1990_29_1_a16,
     author = {Drdla, Josef and Sn\'a\v{s}el, V\'aclav},
     title = {Data type polygon},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {283--289},
     year = {1990},
     volume = {29},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1990_29_1_a16/}
}