1. Vibration of plates;Leissa;NASA SP-160,1969
2. Natural Frequencies of Plates and Shells;Gontkevich,1964
3. Vibration of cantilever plates with rectangular and wedge shaped cross-section;Wilson;Report DF 53 GL 15,1953
4. Determination of the free vibration frequencies of variable thickness plates;Gumeniuk;Dopov AN Ukr SSR,1956
5. Natural frequencies of uniform and non-uniform rectangular cantilever plates;Plunkett;Journal of Mechanical Engineering Science,1963