1. [1] Amick, C. J., Existence of solutions to the nonhomogeneous steady Navier-Stokes equations, Indiana Univ. Math. J., 33 (1984), 817-830.
2. [2] Hopf, E., Ein allgemeiner Endlichkeitssatz der Hydrodynamik, Math. Ann., 117 (1941), 764-775.
3. [3] Hopf, E., On nonlinear partial differential equations, Lecture series of the symposium on partial differential equations, Univ. Kansas (1957) pp. 1-31.
4. [4] Fujita, H., On the existence and regularity of the steady-state solutions of the Navier-Stokes equation, J. Fac. Sci. Univ. Tokyo Sect. I, 9 (1961), 59-102.
5. [5] Fujita, H., On stationary solutions to Navier-Stokes equations in symmetric plane domains under general out-flow condition, Proceedings of International Conference on Navier-Stokes Equations, Theory and Numerical Methods, June 1997, Varenna Italy, Pitman Reseach Notes in Mathematics, 388, pp. 16-30.