Villagrana, Robert E.

• Horgen, H. M.; Villagrana, R. E.; et el. (2015) Computer Enhancement of High Resolution Electron Micrographs Containing Weak Periodic Information
• Horgen, H. M.; Villagrana, R. E.; et el. (2015) Computer Enhancement of Weak-Beam Images
• Lewis, Alan L. and Villagrana, Robert E. (1972) Perturbation Treatment of High-Energy-Electron Diffraction from Imperfect Crystals; Physical Review B; Vol. 6; No. 12; 4382-4392; 10.1103/PhysRevB.6.4382