@article{RM_2001_56_4_a17,
     author = {O. Ya. Viro and S. Yu. Orevkov},
     title = {Congruence mod~8 for real algebraic curves of degree~9},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {770--771},
     publisher = {mathdoc},
     volume = {56},
     number = {4},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2001_56_4_a17/}
}