Comments on "Normal modes of a continuous system with quadratic and cubic non-linearities"
COMMENTS ON "MEASUREMENT OF VIBRATIONAL POWER TRANSMISSION IN CURVED BEAMS"
LOWER FREQUENCIES OF TRANSVERSE VIBRATIONS OF CIRCULAR MEMBRANES WITH DISTURBED BOUNDARIES
COMMENTS ON "INCREASING THE NATURAL FREQUENCIES OF CIRCULAR DISKS USING INTERNAL CHANNELS"
Letters to the Editor - Forced vibrations of simply supported anisotropic rectangular plates