References
- C. Bonatti and V. Grines, Knots as topological invariants for gradient-like diffeomorphisms of the sphere S3. J. Dyn. Control Syst. 6(4) (2000), pp. 579–602.
- R. Fox and E. Artin, Some wild cells and spheres in three-dimensional space. Ann. Math., 49, (4) (1948), pp. 979–990.
- V.Z. Grines, T.V. Medvedev, and O.V. Pochinka, Dynamical Systems on 2- and 3-Manifolds, Developments in Mathematics Vol.46, Springer International Publishing, Cham, Switzerland, 2016.
- K. Kuperberg, 2-wild trajectories. Discrete Cont. Dyn. Syst. Supplement volume (2005), pp. 518–523.
- B. Mazur, A note on some contractible 4-manifolds. Ann. Math. 79(1) (1961), pp. 221–228.
- D. Pixton, Wild unstable manifolds. Topology. 16(2) (1977), pp. 167–172.