1. A.I. Leont’ev, “Gas-Dynamic Methods of Temperature Stratification (a Review),” Fluid Dynamics 37(4), 512 (2002).
2. A.V. Martynov and V.M. Brodyanskii, What Is a Vortex Tube [in Russian], Svyaz, Moscow (1976).
3. Sh.A. Piralishvili, V.M. Polyaev, and M.N. Sergeev, ”Vortex Effect: Experiment, Theory, and Engineering Solutions,” [in Russian], Energomash, Moscow (2000).
4. H. Sprenger, “Über thermische Effekte in Resonanzrohren,” Mitt. Inst. Aerodynamik No. 21, 18 (1954).
5. Yu.B. Eliseev and A.Ya. Cherkez, “On the Heating Effect in Gas Flow over Deep Cavities,” Fluid Dynamics 6(3), 368 (1971).