1. Cambridge Monogr. Mech. Appl. Math.;P. G. Saffman,1992
2. Alekseenko, S. V., Kuibin, P. A., Okulov, V. L., and Shtork, S. I., Helical Vortices in Swirl Flow, J. Fluid Mech., 1999, vol. 382, pp. 195–243.
3. Chang, Ch., Llewellyn Smith, S. G., Axisymmetric Contour Dynamics for Buoyant Vortex Rings, J. Fluid Mech., 2020, vol. 887, no. A28, pp. 28.
4. Delbende, I., Rossi, M., and Piton, B., Direct Numerical Simulation of Helical Vortices, Int. J. Eng. Syst. Model. Simul., 2012, vol. 4, nos. 1–2, pp. 94–101.
5. Delbende, I., Piton, B., and Rossi, M., Merging of Two Helical Vortices, Eur. J. Mech. B Fluids, 2015, vol. 49, part B, pp. 363–372.