1. The lowest natural frequency of circular arcs;den Hartog;Philosophical Magazine Seventh Series,1928
2. In-plane vibrations of circular arcs taking into account several complicating factors;Filipich;Department of Engineering, Universidad Nacional del Sur, 8000-Bahía Blanca, Argentina, Publication No. 88-1,1988
3. Fundamental frequency of non-circular, elastic, hinged arcs;Romanelli;Journal of Sound and Vibration,1972