MathSciNet bibliographic data MR2231894 (2007f:20046) 20E06 (57M07) Calegari, Danny; Dunfield, Nathan M. An ascending HNN extension of a free group inside ${\rm SL}\sb 2\Bbb C$${\rm SL}\sb 2\Bbb C$. Proc. Amer. Math. Soc. 134 (2006), no. 11, 3131–3136 (electronic). Article

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