@article{ELA_2003__10__a10,
     author = {Johnson, Charles R. and Harel, Yonatan and Hillar, Christopher J. and Groves, Jonathan M. and Rault, Patrick X.},
     title = {Absolutely flat idempotents},
     journal = {The electronic journal of linear algebra},
     pages = {190--200},
     publisher = {mathdoc},
     volume = {10},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2003__10__a10/}
}