1. Glickman, T. S., Ed., 2000: Glossary of Meteorology. 2nd ed. Amer. Meteor. Soc., 855 pp., http://glossary.ametsoc.org/.
2. Modeling a no-slip flow boundary with an external force field;Goldstein, D.,1993
3. An objective definition of a vortex;Haller, G.,2005
4. Matplotlib: A 2D graphics environment;Hunter, J. D.,2007
5. On the identification of a vortex;Jeong, J.,1995