Title:Two new species of Syndesmis (Platyhelminthes, Rhabdocoela, Umagillidae) from the sea urchin Pseudechinus magellanicus (Echinodermata, Echinoidea) in the Southwestern Atlantic Ocean
Title:Optimization of the diffraction efficiency in photorefractive crystals / Optimización de la eficiencia de difracción en cristales fotorrefractivos