Golomb, Solomon W. How to number a graph. (English) Zbl 0293.05150 Graph Theory Comput., 23-37 (1972). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 ReviewsCited in 48 Documents MSC: 05C99 Graph theory 05C05 Trees 05C35 Extremal problems in graph theory PDF BibTeX XML Online Encyclopedia of Integer Sequences: Length of shortest (or optimal) Golomb ruler with n marks.