1. G. Chartrand, L. Eroh, M. Johnson and O.R. Oellermann, Resolvability in graphs and the metric dimension of a graph, (Preprint).
2. G. Chartrand, M. Raines and P. Zhang, The directed distance dimension of oriented graphs, Math. Bohem. (to appear).
3. On the partition dimension of a graph;Chartrand,1998
4. On the metric dimension of a graph;Harary;Ars. Combin.,1976
5. Leaves of trees;Slater,1975