Template:Ol'shanskii&Osin&Sapir2009
From Manifold Atlas
A. Y. Ol'shanskii, D. V. Osin and M. V. Sapir, Lacunary hyperbolic groups, Geom. Topol. 13 (2009), no.4, 2051–2140. MR2507115 (2010i:20045) Zbl 1243.20056
