1. A. T. Onufriev and S. A. Khristianovich, ?Features of turbulent motion in a vortex ring,? Dokl. Akad. Nauk SSSR,229, No. 1 (1976).
2. V. A. Vladimirov and V. F. Tarasov, ?Structure of turbulence near the core of a ring vortex,? Dokl. Akad. Nauk SSSR,245, No. 6 (1979).
3. A. T. Onufriev, ?Features of vortical motion in the core of a vortex ring,? in: Physical Mechanics. Dynamic Processes in Gases and Solids [in Russian], Vol. 4, Izd. LGU, Leningrad (1980).
4. T. Maxworthy, ?Some experimental studies of vortex rings,? J. Fluid Mech.,81, No. 3 (1977).
5. G. P. Wang, ?Motion of a turbulent buoyant thermal in a calm stably stratified atmosphere,? Phys. Fluids,16, No. 6 (1973).