by Johannes Cuno and Jörg Lehnert
Reference:
Johannes Cuno and Jörg Lehnert, The Tits alternative for non-spherical triangles of groups, Trans. Lond. Math. Soc., 2(1), 93-124, (2015).
Bibtex Entry:
@Article{CunoLehnert2015,
arxiv = {1405.3433},
author = {Johannes Cuno and J{\"o}rg Lehnert},
journal = {Trans. Lond. Math. Soc.},
title = {The {T}its alternative for non-spherical triangles of groups},
year = {2015},
number = {1},
pages = {93-124},
volume = {2},
doi = {10.1112/tlms/tlv005},
groups = {Project01 (Woess), Student, External},
mrclass = {20E06 (20E05 20F65)},
xxmrnumber = {3432579},
}