1. H. Bossel: “Use of Exponentials in the Integral Solution of the Parabolic Equations of Boundary Layer, Wake, Jet, and Vortex Flows”. Journal of Computational Physics, Vol. 5, No. 3, 1970, pp. 359–382.
2. H. Bossel: “Boundary Layer Computation by an N Parameter Integral Method Using Exponentials”. AIAA Journal, Vol. 8, No. 10, October 1970. pp. 1840–1845.
3. H. Bossel: “Vortex Computation by the Method of Weighted Residuals Using Exponentials”. AIAA Journal, Vol. 9, No. 10, 1971, pp. 2327–2334.
4. N.K. Mitra, H. Bossel: “Compressible Boundary Layer Computation by the Method of Weighted Residuals Using Exponentials”. AIAA Journal, Vol. 9, No. 12, 1971, pp. 2370–2377.
5. H. Bossel: “Study of Vortex Flows at High Swirl by an Integral Method using Exponentials”. Lecture Notes in Physics, Vol. 8, Springer-Verlag, New York 1971, pp. 365–370.