1. Adams D.R.: A note on Riesz potentials. Duke Math. J. 42, 765–778 (1975)
2. Chiarenza F., Frasca M.: Morrey spaces and Hardy–Littlewood maximal function. Rend. Mat. Appl. VII. Ser. 7 3/4, 273–279 (1987)
3. Frehse, J., Steinhauer, M., Weigant, W.: On Stationary Solutions for 2-D Viscous Compressible Isothermal Navier-Stokes Equations. Preprint. J. Math. Fluid Mech. (2007, to appear)
4. Gilbarg D., Trudinger N.-S.: Elliptic Partial Differential Equations of Second Order, 2nd edn. Springer-Verlag, Berlin (1983)
5. Lions, P.-L.: Mathematical Topics in Fluid Mechanics. Compressible Models, Vol. 2. Oxford Science Publications, Clarendon Press, New York, 1998