@inproceedings{e.1982$k$-theory,
title={$K$-theory for certain group$C$^{*}-algebras},
author={E. Christopher Lance},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203300163191341},
booktitle={Acta Mathematica},
volume={151},
number={1},
pages={209-230},
year={1982},
}