1. Polarities in finite projective planes;Baer;Bull. Araer. Math. Soc.,1946
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3. J.A. Bondy unpublished manuscript.
4. J.A. Bondy P. Erdos S. Fajtlowicz Graphs of diameter two with no 4-cycles, Research Report CORR 79/11, Department of Combinatorics and Optimization, University of Waterloo.
5. J.A. Bondy F.Y. Halberstam Parity theorems for paths and cycles in graphs, Research Report CORR 84–1, Department of Combinatorics and Optimization, University of Waterloo.