1. G. J. Ranque. J. Phys. Radium IV/VII (6), 112 (1933).
2. R. Hilsch, Rev. Sci. Instrum. 18 (2), 108 (1947).
3. A. P. Merkulov, Vortex Effect and Its Application in Engineering (Mashinostroenie, Moscow, 1969) [in Russian].
4. Sh. A. Piralishvili, V. M. Polyaev, and M. N. Sergeev, Vortex Effect. Experiment, Theory, Technical Solution (Energomash, Moscow, 2000) [in Russian].
5. P. Promvonge and S. Eiamsa-ard, Renew. Sustain. Energy Rev. 12, 1822 (2008).