Fix reference

diff --git a/include/deal.II/numerics/vector_tools_boundary.h b/include/deal.II/numerics/vector_tools_boundary.h
index 9331e7113b539a89e79433ab797ec91f15176a88..215caf9ab498cf3b6b6a001b802b58c0af5aa18b 100644 (file)
--- a/include/deal.II/numerics/vector_tools_boundary.h
+++ b/include/deal.II/numerics/vector_tools_boundary.h
@@ -739,7 +739,7 @@ namespace VectorTools
    * <h4>Computing constraints</h4>
    *
    * To compute the constraints we use interpolation operator proposed in
-   * Brezzi, Fortin (Mixed and Hybrid (Finite Element Methods, Springer, 1991)
+   * Brezzi, Fortin (Mixed and Hybrid Finite Element Methods, Springer, 1991)
    * on every face located at the boundary.
    *
    * @ingroup constraints