Geodesic
On algebraic differential equations with knotted trajectories
Matematičeskie zametki, Tome 11 (1972) no. 6, pp. 645-650 
Kh. Ganiev. On algebraic differential equations with knotted trajectories. Matematičeskie zametki, Tome 11 (1972) no. 6, pp. 645-650. http://geodesic.mathdoc.fr/item/MZM_1972_11_6_a4/
@article{MZM_1972_11_6_a4,
     author = {Kh. Ganiev},
     title = {On algebraic differential equations with knotted trajectories},
     journal = {Matemati\v{c}eskie zametki},
     pages = {645--650},
     year = {1972},
     volume = {11},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_11_6_a4/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

It is proven that a system of three autonomous differential equations with polynomials (of degree no lower than three) for right sides can have a knotted curve as its solution.