1. Langlois, W. E. andR. S. Rivlin, Steady flow of slightly visco-elastic fluids, Technical Report No. DA-4725/3, Division of Applied Mathematics, Brown University (Providence, R. I. 1959).
2. Hamel, G., Jahresber. d. Deutschen Mathematikervereinigung25, 34 (1917).
3. Ackerberg, R. C., J. Fluid Mech.21, 47 (1965).
4. Kaloni, P. N., J. Phys. Soc. Japan20, 132 (1965).
5. Kaloni, P. N., J. Phys. Soc. Japan20, 610 (1965).