K. Kwitter, E. Lehman, B. Balick, and R. Henry. (2012)cite arxiv:1202.4933
Comment: 46 pages, including 12 figures and 8 tables, submitted to the
Astrophysical Journal.
Y. Algom-Kfir, and M. Bestvina. (2009)cite arxiv:0910.5408
Comment: 15 pages, accepted to Geometriae Dedicata, omitted the comment about
the potential function in rank 2 being equal to injrad (because it was false).