1. L. C. Squire, Modern Compressible Flow: With Historical Perspective, Second Edition, McGraw-Hill Book Co., Berks (1991) 248–248.
2. R. J. Hartfield and J. E. Burkhalter, A complete and robust approach to the axisymmetric method of characteristics for nozzle design, 51st AIAA/SAE/ASEE Joint Propulsion Conference, Orlando (2015).
3. A. H. Shapiro and G. M. Edelman, Method of characteristics for two-dimensional supersonic flow—graphical and numerical procedures, J. Appl. Mech. (1947) A154–A162.
4. E. C. Guentert and H. E. Neumann, Design of Axisymmetric Exhaust Nozzles by Method of Characteristics Incorporating a Variable Isentropic Exponent, Technical Report R-33, National Aeronautics and Space Administration (1959).
5. C. G. Guderley and E. Hantsch, Beste formen für achsensymmetrische überschall schubdüsen, Zeitschrift für Flugwissenschaften, 3(9) (1955) 305–313.