Free vibration of simply supported parallelogrammic plates.

References 1 Squire, H. B., "The Growth of a Vortex in Turbulent Flow," F. M. 2053, 1954, Aeronautical Research Council. 2 Hansen, A. G., Similarity Analysis of Boundary Value Problems in Engineering, 1st ed., Prentice-Hall, 1964, pp. 9-30. 3 Titchener, I. M. and Taylor-Russell, A. J., "Experiments on the Growth of Vortices in Turbulent Flow," Paper 31, 1956, Dept. of Aeronautics, Imperial College. McCormick, B. W., Tangier, J. L., and Sherrieb, H. E., "Structure of Trailing Vortices," Journal of Aircraft, Vol. 5, May-June 1968, pp. 260-267. 2 Sokolnikoff, I. S. and Sokolnikoff, E. S., Higher Mathematics for Engineers and Physicists, 2nd ed., McGraw-Hill, New York and London, 1941, pp. 86-91.