@article{GDZPPN002309300, title = {Intersections of Circles and Curves of Constant Width.}, journal = {Mathematische Annalen}, volume = {212}, year = {1974}, pages = {49-58}, zbl = {0263.52001}, url = {http://dml.mathdoc.fr/item/GDZPPN002309300} }
Goodey, P.R. Intersections of Circles and Curves of Constant Width.. Mathematische Annalen, Tome 212 (1974) pp. 49-58. http://gdmltest.u-ga.fr/item/GDZPPN002309300/