tree; status; branch-weight; median; centroid; second median; second centroid
In this paper we show that in a tree with vertex weights the vertices with the second smallest status and those with the second smallest branch-weight are the same.
 Entringer, R. C., Jackson, D. E., Snyder, D. A.: Distance in graphs
. Czech. Math. J. 26 (1976), 283-296. MR 0543771
| Zbl 0329.05112