Gray, Leonard J, JD Richardson, T Kaplan, J Berger, PA Martin, and Glaucio H Paulino. 2001. “Green S Functions for Exponentially Graded Elastic Materials.”. In , 327. Reference Link
Gray, Leonard J, T Kaplan, JD Richardson, and Glaucio H Paulino. 2003. “Green’s Functions and Boundary Integral Analysis for Exponentially Graded Materials: Heat Conduction”. J. Appl. Mech. 70: 543–549. Reference Link