@article{10_4064_ap109_2_5,
     author = {Tomasz Kobos},
     title = {An alternative proof of {Petty's} theorem on equilateral sets},
     journal = {Annales Polonici Mathematici},
     pages = {165--175},
     publisher = {mathdoc},
     volume = {109},
     number = {2},
     year = {2013},
     doi = {10.4064/ap109-2-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap109-2-5/}
}