@article{10_4153_CMB_2009_017_5,
     author = {Wang, Z. and Chen, J. L.},
     title = {2-Clean {Rings}},
     journal = {Canadian mathematical bulletin},
     pages = {145--153},
     year = {2009},
     volume = {52},
     number = {1},
     doi = {10.4153/CMB-2009-017-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2009-017-5/}
}