@article{SM_1995_80_1_a3,
     author = {N. V. Ilyushechkin},
     title = {On some classes of smooth transformations in the~space of symmetric matrices},
     journal = {Sbornik. Mathematics},
     pages = {75--86},
     publisher = {mathdoc},
     volume = {80},
     number = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_80_1_a3/}
}