Kolář, V., Šístek, J. (2021). On the local axisymmetry of a vortex. In: Venkatakrishnan, L., Majumdar, S., Subramanian, G., Bhat, G., Dasgupta, R., Arakeri, J., eds. Lecture Notes in Mechanical Engineering: Proceedings of 16th Asian Congress of Fluid Mech