%0 Journal Article %A Ilija Tolich %A Astrid an Huef %A Iain Raeburn %T HNN Extensions of Quasi-Lattice Ordered Groups and their Operator Algebras %J Documenta mathematica %D 2018 %P 327-351 %V 23 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/620/ %R 10.4171/dm/620 %F 10_4171_dm_620