@article{ELA_2010__21__a12,
     author = {Da Fonseca, C.M.},
     title = {A lower bound for the number of distinct eigenvalues of some real symmetric matrices},
     journal = {The electronic journal of linear algebra},
     pages = {3--11},
     publisher = {mathdoc},
     volume = {21},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2010__21__a12/}
}