%0 Journal Article %A S. Izumiya %A D. Pei %A M. C. Romero Fuster %T Spacelike Surfaces in Anti de Sitter Four-Space from a~Contact Viewpoint %J Informatics and Automation %D 2009 %P 164-181 %V 267 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2009_267_a12/ %G en %F TRSPY_2009_267_a12