K. S. Easwarakumar C. Pandu Rangan Grant A. Cheston A Linear Algorithm for Centering a Spanning Tree of a Biconnected Graph. 121-124 1994 51 Inf. Process. Lett. 3 db/journals/ipl/ipl51.html#EaswarakumarRC94 http://dx.doi.org/10.1016/0020-0190(94)00066-2