%0 Journal Article
%T Circuminscribed polygons in a plane annulus
%A Waldemar Cie lak
%A El bieta Szczygielska
%J Annales UMCS, Mathematica
%D 2008
%I 
%R 10.2478/v10062-008-0005-3
%X Each oval and a natural number n ¡Ý 3 generate an annulus which possesses the Poncelet's porism property. A necessary and sufficient condition of existence of circuminscribed n-gons in an annulus is given.
%K Poncelet's porism
%K isoptics
%K parallel curves
%U http://versita.metapress.com/content/m730388mh7g2qmx7/?p=523a41966257492cbc6073b6c32b0bd5&pi=4