@article{SEMR_2014_11_a28,
     author = {M. A. Grechkoseeva and A. M. Staroletov},
     title = {Unrecognizability by spectrum of finite simple orthogonal groups of~dimension nine},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {921--928},
     publisher = {mathdoc},
     volume = {11},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2014_11_a28/}
}