1. Grönig H (1990) Past, present and future of shock focusing research. In: Takayama K (ed) Proc. Int. Workshop on Shock Wave Focusing, Institute of Fluid Science, Tohoku University, Sendai, Japan. pp 1?37
2. Inoue O, Takahashi N, Takayama K (1993) Shock wave focusing in a log-spiral duct. AlAA Jnl. 31:1150
3. Milton BE, Archer RD (1969) Generation of implosions by area change in a shock tube. AlAA Jnl. 7:779
4. Milton BE, Takayama K, Archer RD (1988) An evaluation of two-dimensional and axi-symmetric focusing of a plane shock wave. In: Grönig H (ed) Shock tubes and waves, Proc. 16th International Symposium on Shock Tubes and Waves, Aachen, West Germany, July 26?31, 1987. VCH Verglagsgesellschaft, West Germany, pp 567?573
5. Milton BE (1990) The focussing of shock waves in two-dimensional and axi-symmetrical ducts. In: Takayama K (ed) Proc. International Workshop on Shock Wave Focussing, Institute of Fluid Science, Tohoku University, Sendai, Japan. pp 155?192