==Further reading==*"Spinning Flight : Dynamics of Frisbees, Boomerangs, Samaras and Skipping Stones", Ralph Lorenz, Copernicus New York, September 2006 ISBN 0-387-30779-6
* "Spinning Flight : Dynamics of Frisbees, Boomerangs, Samaras and Skipping Stones", Ralph Lorenz, Copernicus New York, September 2006 ISBN 0-387-30779-6