1. On the Solution of the Laminar Boundary Layer Equations;Howarth;Proc. Roy. Soc., London, A,1938
2. An Analysis of Laminar Free-Convection Flow and Heat Transfer about a Flat Plate Parallel to the Direction of the Generating Body Force;Ostrach;NACA Tech. Note 2635,1952
3. Stability of Laminar Viscous Flows with a Body Force;Ostrach;International Developments in Heat Transfer, 1961, International Heat Transfer Conference, Part V,1962