1. Attaway, D.C.: The boundary element method for the diffusion equation: a feasibility study. In: Morino, L., Piva, R. (eds.) Boundary Integral Methods—Theory and Applications. Springer, Berlin (1991)
2. Beauchamp, P.: A potential-vorticity decomposition for the boundary integral equation analysis of viscous flows, Ph. D. Thesis, Graduate School, Division of Engineering and Applied Science, Boston University, Boston, MA (1990)
3. Bykhovskiy, E.B., Smirnov, N.V.: On orthogonal expansions of the space of vector functions which are square-summable over a given domain and the vector analysis operators. Trudy Mat. Inst. Steklove, vol. 59, No. 5, pp. 5–36, Academy of Sciences USSR Press (1960) (In Russian; English translation available as NASA TM-77051, 1983)
4. Carrier, F.G., Krook, M., Pearson, C.E.: Functions of a Complex Variable; Theory and Technique. McGraw-Hill, New York (1966)
5. Casciola, C.M., Piva, R.: A Lagrangian approach for vorticity intensification in swirling rings. Comput. Mech. 21, 276–282 (1998)