%0 Journal Article %A Zubeyir Cinkir %T The tau constant of a metrized graph and its behavior under graph operations %J The electronic journal of combinatorics %D 2011 %V 18 %N 1 %U http://geodesic.mathdoc.fr/articles/10.37236/568/ %R 10.37236/568 %F 10_37236_568