J. S. Tomar and A.K. Gupta, “Effect of Exponential Temperature Variation on Frequencies of an Orthotropic Rectangular Plate of Exponentially Varying Thickness.”, Proc. of Workshop on Computer Application in Continuum Mechanics,March 11-13, Dept. of Maths. University of. Roorkee, Roorkee, 1985, PP47-52.
 A.K. Gupta, Tripti Johri, R.P. Vats, “Study of thermal gradient effect on a non-homogeneous orthotropic rectangular plate having bidirection linearly thickness variation.”, Meccanica 45(3), 2010, PP 393-400.
 A.K. Gupta, Tripti Johri, R.P. Vats, “Thermal Effect on Vibration of Non-homogeneous Orthotropic Rectangular Plate Having Bi-directional Parabolically Varying Thickness”. Proceedings of World Congress on Engineering and Computer Science, 2007, PP784-787.