%0 Journal Article %A Melzak, Z.A. %T A Property of Plane Sets of Constant Width %J Canadian mathematical bulletin %D 1963 %P 409-415 %V 6 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1963-036-6/ %R 10.4153/CMB-1963-036-6 %F 10_4153_CMB_1963_036_6