1. Murman, E. M. and Cole, J. D., AIAA J., 9, 114 (1971).
2. Jameson, A., Grumman Aerodynamics Report 370-71-1, 1971.
3. Garabedian, P. R. and Korn, D. G., Comm. Pure and Appl. Math., 24, 841 (1972).
4. South, J. C. Jr. and Jameson, A., in Proceedings of AIAA Computational Fluid Dynamics Conference, pp. 8–17, 1973.
5. Grossman, B. and Melnik, R. E., AIAA Paper No. 75–62, 1975.