@article{AIF_2020__70_4_1497_0,
     author = {Bryder, Rasmus Sylvester and Ivanov, Nikolay A. and Omland, Tron},
     title = {$C^{*}$-simplicity of {HNN~extensions} and groups~acting~on~trees},
     journal = {Annales de l'Institut Fourier},
     pages = {1497--1543},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {70},
     number = {4},
     year = {2020},
     doi = {10.5802/aif.3378},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/aif.3378/}
}