↑J. Lederberg: DENDRAL-64: A System for Computer Construction, Enumeration and Notation of Organic Molecules as Tree Structures and Cyclic Graphs. Part II: Topology of Cyclic Graphs. Interim Report to the National Aeronautics and Space Administration. Grant NsG 81-60. 15. Dezember 1965. [1] (PDF)
↑H. S. M. Coxeter, R. Frucht, D. L. Powers: Zero-Symmetric Graphs: Trivalent Graphical Regular Representations of Groups. Academic Press, New York 1981.