1. N. Aronszajn, E. Gagliardo, Interpolation spaces and interpolation methods. Ann. Mat. Pura Appl 68, 51–117 (1965)
2. K.I. Babenko, On stationary solutions of the problem of flow past a body of a viscous incompressible fluid. Mat. Sb. 91(133), 3-27 (1973)
3. English Transl.: Math. SSSR Sbornik 20, 1-25 (1973)
4. K.I. Babenko, Spectrum of the linearized problem of flow of a viscous incompressible liquid around a body. Dokl. Akad. Nauk SSSR 262(1), 64-68 (1982)
5. English Transl.: Sov. Phys. Dokl. 27(1), 25-27 (1982)