ed. by Barbara Elvers.Ullmann`s encyclopedia of industrial chemistry：index to volumes A1 to All, B2, B3 (Abrasives to formaldehyde unit operations I and II).VCH Verlagsgesellschaft mbH,1989.
D. Kuchemann.The aerodynamic design of aircraft：A detailed introduction to the current aerodynamic Knowledge and practical guide to the solution of aircraft design problems.Pergamon Pr.,1978.
The aerodynamic design of aircraft：A detailed introduction to the current aerodynamic Knowledge and practical guide to the solution of aircraft design problems
