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
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