@article{ERAAMS_2001_07_a8,
     author = {Ol{\textquoteright}shanskii, A. and Sapir, M.},
     title = {Non-amenable finitely presented torsion-by-cyclic groups},
     journal = {Electronic research announcements of the American Mathematical Society},
     pages = {63--71},
     publisher = {mathdoc},
     volume = {07},
     year = {2001},
     doi = {10.1090/S1079-6762-01-00095-6},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-01-00095-6/}
}