From

Effect of Thermal Gradient on Vibration of Non-Homogeneous Parallelogram Plate of Linearly Varying Thickness in Both Directions

Arun Kumar Gupta, Kumud Rana, Dharma Veer Gupta

Journal of Mathematical Sciences and Applications. 2013, 1(3), 43-49 doi:10.12691/jmsa-1-3-2