\Bibitem{Rep04} \by S.~I.~Repin \paper Estimates of deviation from the exact solutions for some boundary-value problems with incompressibilily condition \jour Algebra i Analiz \yr 2004 \vol 16 \issue 5 \pages 124--161 \mathnet{http://mi.mathnet.ru/aa635} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=2106670} \zmath{https://zbmath.org/?q=an:1174.35461} \transl \jour St. Petersburg Math. J. \yr 2005 \vol 16 \issue 5 \pages 837--862 \crossref{https://doi.org/10.1090/S1061-0022-05-00882-4}