The Total External Branch Length of Beta-Coalescents. Dahmer, I.; Kersting, G.; and Wakolbinger, A. Combinatorics, Probability & Computing, 23(6):1010-1027, 2014.
Link
Paper bibtex @article{journals/cpc/DahmerKW14,
author = {Dahmer, Iulia and Kersting, Götz and Wakolbinger, Anton},
ee = {http://dx.doi.org/10.1017/S0963548314000297},
interhash = {ae55854e9c612b1da817e94ec732e9f7},
intrahash = {7b9b18bc0a32aba571de1ecb9507b4b9},
journal = {Combinatorics, Probability & Computing},
number = 6,
pages = {1010-1027},
title = {The Total External Branch Length of Beta-Coalescents.},
url = {http://dblp.uni-trier.de/db/journals/cpc/cpc23.html#DahmerKW14},
volume = 23,
year = 2014
}