"Wavelet coefficients thresholding method applied to the correlation of noisy scenes" (2004) Mazzaferri, J.; Ledesma, S. RIAO/OPTILAS 2004: 5th Iberoamerican Meeting on Optics, and 8th Latin American Meeting on Optics, Lasers, and their Applications; ICO Regional Meeting. 5622(PART 2):617-621

"Symmetry properties with pupil phase-filters" (2004) Ledesma, S.; Campos, J.; Escalera, J.C.; Yzuel, M.J. Optics Express. 12(11):2548-2559

"Simple expressions for performance parameters of complex filters, with applications to super-Gaussian phase filters" (2004) Ledesma, S.; Campos, J.; Escalera, J.C.; Yzuel, M.J. Optics Letters. 29(9):932-934

"Optical simulation of quantum algorithms using programmable liquid-crystal displays" (2004) Puentes, G.;La Mela, C.;Ledesma, S. (...)Saraceno, M. Physical Review A - Atomic, Molecular, and Optical Physics. 69(4):042319-1-042319-5

"Direct visualization of surface-plasmon bandgaps in the diffuse background of metallic gratings" (2004) Depine, R.A.; Ledesma, S. Optics Letters. 29(19):2216-2218