1. Chigier, N. A. & Beer J. M. 1964 The flow region near the nozzle in double concentric jets. Trans. ASME D:J. Basic Engng 86,797–804.
2. Becker, H. A. & Massaro T. A. 1968 Vortex evolution in a round jet.J. Fluid Mech. 31,435–448.
3. White F. M. 1974 Viscous Fluid Flow. McGraw-Hill.
4. Kwan, A. S. H. & Ko N. W. M. 1977 The initial region of subsonic coaxial jets. Part 2.J. Fluid Mech. 82,273–287.
5. MoUhring W. 1978 On vortex sound at low Mach number.J. Fluid Mech. 85,685–691.