@inproceedings{j.1965non-unitary, title={Non-unitary dual spaces of groups}, author={J. M. G. Fell}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203207406299001}, booktitle={Acta Mathematica}, volume={114}, number={1}, pages={267-310}, year={1965}, }