1. Beer, J. M. and N. A. Chigier; Combustion Aerodynamics, p. 100–146, Robert E. Krieger Publishing Co., Florida, USA (1983)
2. Gupta, A. K., D. G. Lilley and N. Syred; Swirl Flow, p. 1–15, Abacus-Press, Kent, USA (1984)
3. Hirama, T., M. Tomita, M. Horio, T. Chiba and H. Kobayashi; “A Two Stage Fluidized-Bed Coal Combustor for Effective Reduction of NOx Emission,” Fluidization IV, p. 443–450, ed. D. Kunii and R. Toei, Engineering Foundation, New York, USA (1984)
4. Ikeda, S., J. Tatebayashi, K. Yano and S. Yutani; “Fluidized-Bed Combustion of Coal: Effect of Various Parameters on Combustion Efficiency,” Proc. 4th Int. Conf. on Fluidization, p. 499–505, Engineering, Foundation, New York, USA (1983)
5. Lee, J. K., C. G. Hu, Y. S. Shin and H. S. Chun; “Combustion Characteristics of a Two-Stage Swirl-Flow Fluidized Bed Combustor,” Can. J. Chem. Eng., 68, 825–830 (1990)