“…(1.1)-(1.2) in Chapter 4, Section 4.1, p. 129 in [49]. All assumptions required by Theorem 1 and Theorem 2 in [49], Chapter 4, are fulfilled. Therefore there exists a unique solution ω ν n ,R,n t which belongs to the class L 2 (0, T ; W k,2 (T 2 )) ∩ C([0, T ], W k−1,2 (T 2 )) and satisfies Eq.…”