Santos, R.D., Catalan, F.C.I., Gonzalez, V.A.C. and Almoro, P.F. 2009. Development of a simplified model for deformation and strain analyses via digital shearography. Proceedings of the Samahang Pisika ng Pilipinas, 27(1), SPP-2009-PA-14. URL: https://proceedings.spp-online.org/article/view/SPP-2009-PA-14.