@article{ZNSL_2005_323_a3,
     author = {M. Dana and Kh. D. Ikramov},
     title = {On the codimension of the variety of symmetric  matrices with multiple eigenvalues},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {34--46},
     publisher = {mathdoc},
     volume = {323},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2005_323_a3/}
}