Gonzalez, V.A.C., Catalan, F.C.I., Santos, R.D. and Almoro, P.F. 2009. Evaluation of a diffusing mask as speckle generator in digital shearography. Proceedings of the Samahang Pisika ng Pilipinas, 27(1), SPP-2009-PA-12. URL: https://proceedings.spp-online.org/article/view/SPP-2009-PA-12.