@article{RM_1984_39_3_a4,
     author = {A. V. Alekseev},
     title = {On~the parity of the number of points of intersection of cusp edges of a~front with its surface},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {195--196},
     publisher = {mathdoc},
     volume = {39},
     number = {3},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1984_39_3_a4/}
}