Comments on "Normal modes of a continuous system with quadratic and cubic non-linearities"
LOWER FREQUENCIES OF TRANSVERSE VIBRATIONS OF CIRCULAR MEMBRANES WITH DISTURBED BOUNDARIES
COMMENTS ON "MEASUREMENT OF VIBRATIONAL POWER TRANSMISSION IN CURVED BEAMS"
COMMENTS ON "INCREASING THE NATURAL FREQUENCIES OF CIRCULAR DISKS USING INTERNAL CHANNELS"
TRANSVERSE VIBRATIONS OF A THIN ELLIPTICAL PLATE WITH A CONCENTRIC, CIRCULAR FREE EDGE HOLE
TRANSVERSE VIBRATIONS OF A CLAMPED RECTANGULAR PLATE OR SLAB WITH AN ORTHOTROPIC PATCH