1. Topology;Alexandroff,1935
2. Sur la topologie des ecoulements stationnaires des fluides parfaits;Arnold;C. R. Acad. Sci. Paris,1965
3. On the topology of three-dimensional steady flows of an ideal fluid;Arnold;J. Appl. Math. Mech.,1966
4. An Introduction to Fluid Dynamics;Batchelor,1967
5. Advanced Symmetry Methods for Partial Differential Equations;Bluman,2009