Prosenjit Bose Hazel Everett Sándor P. Fekete Michael E. Houle Anna Lubiw Henk Meijer Kathleen Romanik Günter Rote Thomas C. Shermer Sue Whitesides Christian Zelle A Visibility Representation for Graphs in Three Dimensions. 1998 2 J. Graph Algorithms Appl. 2 http://www.cs.brown.edu/publications/jgaa/accepted/98/Bose+a4-98.2.3.pdf db/journals/jgaa/jgaa2.html#BoseEFHLMRRSWZ98