Farwig, R., H. Sohr, and W. Varnhorn. “Local Strong Solutions of the Nonhomogeneous Navier-Stokes System With Control of the Interval Ofexistence”. Topological Methods in Nonlinear Analysis, vol. 46, no. 2, Dec. 2015, pp. 999-1012, doi:10.12775/TMNA.2015.074.