1. On stationary solutions of the problem of flow past a body of a viscous incompressible fluid;Babenko;Mat. USSR Sb.,1973
2. Nonlinear Semigroups and Differential Equations in Banach Spaces;Barbu,1976
3. Optimal Control of Variational Inequalities;Barbu,1984
4. Analysis and Control of Nonlinear Infinite Dimensional Systems;Barbu,1993
5. Time optimal control of Navier–Stokes equations;Barbu;Systems Control Lett.,1997