On the boundness of the Stokes semigroup in two-dimensional exterior domains. Wolfgang Borchers; Werner Varnhorn — 1993 Mathematische Zeitschrift
L2 Decay for the Navier-Stokes Flow in Halfspaces. Wolfgang Borchers; Tetsuro Miyakawa — 1988 Mathematische Annalen
On the Semigroup of the Stokes Operator for Exterior Domains in Lq-Spaces. Hermann Sohr; Wolfgang Borchers — 1987 Mathematische Zeitschrift