Hermosa, N.P. 2006. Psuedo-nondiffracting and self-reconstructing properties of helico-conical optical beams. Proceedings of the Samahang Pisika ng Pilipinas, 24(1), SPP-2006-3D-01. URL: https://proceedings.spp-online.org/article/view/SPP-2006-3D-01.