@article{SIGMA_2015_11_a55,
     author = {Christopher Michael Ormerod and Yasuhiko Yamada},
     title = {From {Polygons} to {Ultradiscrete} {Painlev\'e} {Equations}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2015},
     volume = {11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2015_11_a55/}
}