@article{RM_1984_39_5_a15,
     author = {V. S. Kulikov},
     title = {On~the number of singular focal centres of the projection of an algebraic surface},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {279--280},
     publisher = {mathdoc},
     volume = {39},
     number = {5},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1984_39_5_a15/}
}