1. Boussinesq, J. 1903 Theorie Analytique de la Chaleur , vol. 2. Paris:Gauthier-Villars.
2. Vest, C. M. & Arpaci, V. S. 1969 J. Fluid Mech. 36,1.
3. Ostrach, S. 1964 In Theory of Laminar Flows (ed. F. K. Moore ), ch. F4.Oxford University Press.
4. Lance, G. N. 1960 Numerical Methods for High Speed Computers .London:Iliffe and Sons Ltd.