diff --git a/doc/ref.xml b/doc/ref.xml
index 44743955..99b161ae 100644
--- a/doc/ref.xml
+++ b/doc/ref.xml
@@ -483,7 +483,7 @@ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
                 <type>std::pair&lt;iterator, iterator&gt;</type>
               </signature>
               <returns>
-                <para>A range with containing all elements with key equivalent to <code>k</code>.
+                <para>A range containing all elements with key equivalent to <code>k</code>.
                   If the container doesn't container any such elements, returns
                   <code><functionname>std::make_pair</functionname>(<methodname>b.end</methodname>(),<methodname>b.end</methodname>())</code>.
                   </para>
@@ -1099,7 +1099,7 @@ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
                 <type>std::pair&lt;iterator, iterator&gt;</type>
               </signature>
               <returns>
-                <para>A range with containing all elements with key equivalent to <code>k</code>.
+                <para>A range containing all elements with key equivalent to <code>k</code>.
                   If the container doesn't container any such elements, returns
                   <code><functionname>std::make_pair</functionname>(<methodname>b.end</methodname>(),<methodname>b.end</methodname>())</code>.
                   </para>
@@ -1734,7 +1734,7 @@ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
                 <type>std::pair&lt;iterator, iterator&gt;</type>
               </signature>
               <returns>
-                <para>A range with containing all elements with key equivalent to <code>k</code>.
+                <para>A range containing all elements with key equivalent to <code>k</code>.
                   If the container doesn't container any such elements, returns
                   <code><functionname>std::make_pair</functionname>(<methodname>b.end</methodname>(),<methodname>b.end</methodname>())</code>.
                   </para>
@@ -2378,7 +2378,7 @@ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
                 <type>std::pair&lt;iterator, iterator&gt;</type>
               </signature>
               <returns>
-                <para>A range with containing all elements with key equivalent to <code>k</code>.
+                <para>A range containing all elements with key equivalent to <code>k</code>.
                   If the container doesn't container any such elements, returns
                   <code><functionname>std::make_pair</functionname>(<methodname>b.end</methodname>(),<methodname>b.end</methodname>())</code>.
                   </para>