%0 Journal Article %A R. Tamassia %A Ioannis G. Tollis %T A Unified Approach to Visibility Representations of Planar Graphs. %J Discrete & computational geometry %D 1986 %P 321-342 %V 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DCG_1986__1_131000/ %F DCG_1986__1_131000