@article{10_4153_CJM_2014_032_2,
     author = {Hua, Jiajie and Lin, Huaxin},
     title = {Rotation {Algebras} and the {Exel} {Trace} {Formula}},
     journal = {Canadian journal of mathematics},
     pages = {404--423},
     year = {2015},
     volume = {67},
     number = {2},
     doi = {10.4153/CJM-2014-032-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2014-032-2/}
}