1. Uniquely intersectable graphs;Alter;Discrete Math.,1977
2. Graphs and Hypergraphs;Berge,1973
3. Perfect graphs;Berge,1975
4. A characterization of rigid circuit graphs;Buneman;Discrete Math,1974
5. Intersection properties of boxes in ℝd, unpublished mimeograph, Univ;Danzer,1967